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6 Best Internet Providers in Port Costa, CA

Find internet availability by address in Port Costa, CA

Jump to: Best Internet Provider | Availability Maps | Customer Reviews | Port Costa ISP Report Card | Business Internet in Port Costa

Port Costa ISP Report at a Glance
ISP grade Port Costa ISP Report Card C-
Average speed Download Speed for Most Households 1,078 Mbps
ISP count Number of Internet Service Providers 6
Customer review count Real Port Costa Customer Ratings 2

This page reflects the most recent FCC update from January 06, 2026, based on the Broadband Data Collection as of June 30, 2025.

Data update information

This page reflects the most recent FCC update from January 06, 2026, based on the Broadband Data Collection as of June 30, 2025.

Port Costa has 6 internet service providers, they are sorted by coverage, available speed, and customer rating from our unbiased internet provider report. Cable, Fixed Wireless, and DSL internet are available in the city. Reviews are grouped by provider and the type of service they offer, covering all 3 available internet technologies in Port Costa.

Port Costa overview

Port Costa has 6 internet service providers, they are sorted by coverage, available speed, and customer rating from our unbiased internet provider report. Cable, Fixed Wireless, and DSL internet are available in the city. Reviews are grouped by provider and the type of service they offer, covering all 3 available internet technologies in Port Costa.

Compare Providers Ranked by Coverage, Speed, and Customer Ratings

EarthLink

EarthLink logo

Availability:

93.4%

Customer Rating:

3.8 of 5 stars

(13)

View Plans

1-877-418-2092 Price: Starting at $54.95 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in Port Costa.

Max Download Speed InfoCalculated from the maximum speeds available to most Port Costa residents, weighted by user distribution.

Customer Rating

DSL

83.3%

21 Mbps

50 Mbps

DSL: 3.8 of 5 stars

(4)

Fixed Wireless

73.0%

25 Mbps

25 Mbps

Wireless: 0.0 of 5 stars

(0)

AT&T

AT&T logo

Availability:

93.4%

Customer Rating:

3.7 of 5 stars

(1,051)

View Plans

1-877-610-1219 Price: $65.00 - $90.00 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in Port Costa.

Max Download Speed InfoCalculated from the maximum speeds available to most Port Costa residents, weighted by user distribution.

Customer Rating

DSL

83.3%

21 Mbps

50 Mbps

DSL: 3.3 of 5 stars

(304)

Fixed Wireless

73.0%

25 Mbps

25 Mbps

Wireless: 3.6 of 5 stars

(164)

XFINITY

XFINITY logo

Availability:

83.0%

Customer Rating:

3.4 of 5 stars

(2,391)

View Plans

1-877-244-3013 Price: $40.00 - $130.00 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in Port Costa.

Max Download Speed InfoCalculated from the maximum speeds available to most Port Costa residents, weighted by user distribution.

Customer Rating

Cable

83.0%

1,200 Mbps

1,200 Mbps

Cable: 3.3 of 5 stars

(1,910)

T-Mobile Home Internet

T-Mobile Home Internet logo

Availability:

63.5%

Customer Rating:

4.0 of 5 stars

(341)

View Plans

1-833-601-2935 Price: $55.00 - $105.00 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in Port Costa.

Max Download Speed InfoCalculated from the maximum speeds available to most Port Costa residents, weighted by user distribution.

Customer Rating

Fixed Wireless

63.5%

26 Mbps

100 Mbps

Wireless: 3.9 of 5 stars

(204)

Above are the top 4 providers in Port Costa, CA for most people based on high speed internet coverage, speeds, and customer reviews. Click below to see all providers in your city.


Verizon

Verizon logo

Availability:

56.6%

Customer Rating:

3.8 of 5 stars

(811)

View Plans

1-833-213-7018 Price: $49.99 - $89.99 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in Port Costa.

Max Download Speed InfoCalculated from the maximum speeds available to most Port Costa residents, weighted by user distribution.

Customer Rating

Fixed Wireless

56.6%

300 Mbps

300 Mbps

Wireless: 3.7 of 5 stars

(170)

Unwired

Unwired logo

Availability:

27.4%

Customer Rating:

1.0 of 5 stars

(1)

View Plans

Price: $59.99 - $79.99 / mo.

Connection

Availability

Avg. Download Speed InfoThe highest download speed available in Port Costa.

Max Download Speed InfoCalculated from the maximum speeds available to most Port Costa residents, weighted by user distribution.

Customer Rating

Fixed Wireless

27.4%

300 Mbps

300 Mbps

Wireless: 0.0 of 5 stars

(0)

Providers with less than 1% coverage in this city are excluded from the list. To see if one of these providers is available at your home, please use the address search above.

Satellite providers, which generally offer 100% coverage across the United States, are available for Port Costa residents as well. Some of the top satellite options include Dish Network, DirecTV, HughesNet, Viasat, and Starlink. These providers offer varied services and pricing, giving residents flexibility in choosing the best option for their location and needs.

Dish

Dish logo

Availability:

100%

Customer Rating:

3.6923 of 5 stars

(13)

View Plans

1-866-252-1910 Price: {{isp_price_range}}


DirecTV

DirecTV logo

Availability:

100%

Customer Rating:

4.3333 of 5 stars

(9)

View Plans

1-844-294-9501 Price: {{isp_price_range}}


Viasat

Viasat logo

Availability:

100%

Customer Rating:

1.7273 of 5 stars

(11)

View Plans

1-833-875-1370 Price: {{isp_price_range}}


HughesNet

HughesNet logo

Availability:

100%

Customer Rating:

2.4286 of 5 stars

(21)

View Plans

1-833-684-9249 Price: {{isp_price_range}}


Starlink

Starlink logo

Availability:

100%

Customer Rating:

3.9836 of 5 stars

(61)

View Plans

Price: {{isp_price_range}}

Speed and technology may vary by address for all providers. Please note we may have a financial relationship with some of the providers above, which does not impact the customer ratings displayed. Customer ratings listed above are national ratings, local Port Costa ratings may vary and are shown below.

Who is the Best Internet Provider in Port Costa, CA?

XFINITY from Comcast is the best internet provider in Port Costa based on California customer satisfaction ratings and reviews. Based on our extensive and unbiased survey, XFINITY from Comcast had the best reviews at the local, state, and national levels versus all available providers in Port Costa, making it a solid recommendation among providers with reviews. XFINITY from Comcast is an option for 83.02% of the city.

The chart and table below show average customer ratings from customers in Port Costa, California, and customers throughout the country.

Top Rated Internet Providers in Port Costa


XFINITY4.003.413.37
AT&T4.003.293.66
T-Mobile Home InternetN/A4.004.04
VerizonN/A3.713.82
  • City Rating
  • State Rating
  • National Rating

Local, State, and National Ratings for all Port Costa Internet Providers

ISP / Tech TypePort Costa OverallCalifornia OverallNational OverallFor Service
XFINITY (1) (193) (2164)View Plans
AT&T (1) (107) (924)View Plans
T-Mobile Home Internet (0) (22) (284)View Plans
Verizon (0) (24) (723)View Plans
HughesNet (0) (1) (18)View Plans
Viasat (0) (1) (11)View Plans
EarthLink (0) (2) (12)View Plans
Unwired (0) (1) (1)View Plans

Based on 351 reviews from California internet customers, XFINITY from Comcast is the best internet service provider for Port Costa residents. XFINITY from Comcast was rated at an average of 3.41 out of 5 in our report for overall customer satisfaction. AT&T wins for second-place in California, with 4.00 out of 5 stars and 93.4% coverage in Port Costa.

At a national level, based on 4137 national reviews for any of the providers listed above, T-Mobile Home Internet is rated higher than any other provider, with a rating of 4.04 out of 5.

Which Providers are Available at my Home in Port Costa?

The map shows speeds per provider and where each provider is available. Click the drop-down menu to choose
a different provider.

Port Costa, CA map of internet availability

Internet Availability Key

0%
10%
50%
100%

 

Speeds and coverage vary within the city, and sometimes even from block to block. The map shows speeds per provider and where each provider is available.

Who is the Fastest Internet Provider in Port Costa?

Based on both FCC data and unbiased customer ratings in Port Costa, the fastest internet in the city comes from XFINITY from Comcast.

Data Reported to FCC by ISPs: Average Maximum Available in Port Costa

Max Advertised Speed in Port Costa, CA


ISP / Tech TypeMax Advertised Speed
XFINITY from Comcast1,200 Mbps
Unwired300 Mbps
Verizon300 Mbps
T-Mobile Home Internet100 Mbps
Viasat100 Mbps
EarthLink50 Mbps
AT&T50 Mbps
HughesNet25 Mbps

Customer Ratings for Internet Provider Speeds in Port Costa


XFINITY4.003.803.77
AT&T3.003.223.75
VerizonN/A3.834.00
T-Mobile Home InternetN/A3.823.96
  • City Rating
  • State Rating
  • National Rating

ISP / Tech TypePort Costa SpeedCalifornia SpeedNational SpeedFor Service
XFINITY (1) (193) (2164)View Plans
AT&T (1) (107) (924)View Plans
Verizon (0) (24) (723)View Plans
T-Mobile Home Internet (0) (22) (284)View Plans
HughesNet (0) (1) (18)View Plans
Unwired (0) (1) (1)View Plans
Viasat (0) (1) (11)View Plans
EarthLink (0) (2) (12)View Plans

Based on data reported by Port Costa ISPs to the FCC, the fastest speeds in the city are available through XFINITY from Comcast. The company offers speeds up to 1,200 Mbps in Port Costa. Therefore, the average customer can get up to 1,200 Mbps if they're willing to purchase the fastest subscription tier available at their homes.

However, actual customers in the city rated their satisfaction with internet speed highest with XFINITY from Comcast. This indicates XFINITY reliably delivers speeds expected by the customer based on the plan they are paying for.

Who is the Cheapest Internet Provider in Port Costa?

California customers rate AT&T as the cheapest internet service provider in state. Data comes from customers in the state rating their satisfaction with pricing. This feedback is valuable because it considers price changes and whether the speeds paid for are worth it.

AT&T received a local rating of 4.00 out of 5, which is lower than the average across all internet providers in the country. XFINITY from Comcast is rated in second place for affordability by the company’s Port Costa customers with an average price rating of 3.00 out of 5.

The chart and graph below show how customers in Port Costa, California, and the United States rated the affordability of their internet service.

Rated Affordability in Port Costa


AT&T4.003.213.51
XFINITY3.003.123.03
T-Mobile Home InternetN/A4.184.11
VerizonN/A3.753.50
  • City Rating
  • State Rating
  • National Rating

ISP / Tech TypePort Costa AffordabilityCalifornia AffordabilityNational AffordabilityFor Service
AT&T (1) (107) (924)View Plans
XFINITY (1) (193) (2164)View Plans
T-Mobile Home Internet (0) (22) (284)View Plans
Verizon (0) (24) (723)View Plans
HughesNet (0) (1) (18)View Plans
Viasat (0) (1) (11)View Plans
EarthLink (0) (2) (12)View Plans
Unwired (0) (1) (1)View Plans

Port Costa Internet Health Assessment

ISP Reports evaluates the technological infrastructure across the United States. This includes assessing a grade for ISP providers and infrastructure in the city and setting an index number for the digital connectivity of its residents. You can view the ISP Report Card and the Digital Connectivity Index for Port Costa below, including the metrics used and how Port Costa compares to the rest of California and nation.

Port Costa ISP Report Card: C-
Metric

(hover for details)
Port Costa California USA
0.00% 56.12% 67.25%
1,078 Mbps 3,631 Mbps 3,293 Mbps
5.8 7.4 6.8

 

Port Costa Digital Connectivity Index: 74 / 100
Metric

(hover for details)
Port Costa California USA
2.1 3.0 2.7
20% 15% 14%
99% 96% 95%
100% 93% 90%
80% 78% 75%
86% 79% 76%

Our demographic data is sourced from the latest 5-year release of the American Community Survey by the US Census Bureau.

Port Costa ISP Report Card & Digital Connectivity Index

The ISP Report Card in Port Costa is C-, which is much better than other cities. The local demand for broadband internet connectivity in Port Costa is high with a score of 74 / 100 in our Digital Connectivity Index. This means that internet service providers operating in Port Costa have done a good job meeting the needs of its residents.

The Port Costa ISP Report Card evaluates the city on availability and speed metrics compared to other cities in the United States. ISP Infrastructure can vary greatly and on its own isn’t a perfect measure of what a city needs. Please see our ISP Report Card along with the Digital Connectivity Index above to evaluate how well the connectivity demand is met by the existing infrastructure.

100% of Port Costa households have an internet connection while having 94.03% availability. 80% of households have fiber, cable, or DSL, 15% have satellite, 0% are still on dial-up, and 0% of households have internet but don’t pay for a subscription because it’s subsidized by the Affordable Connectivity Program.

As you can see in the table above, while 80% of households have a broadband connection such as fiber, cable or DSL available to their home, 86% subscribe to it. A very large amount of Port Costa residents are taking advantage of the available internet infrastructure.

For more details, please visit our ISP Report Card and Digital Connectivity Index pages.

How do Neighboring Cities Compare to Port Costa?

Crockett, CA

  • ISP Report Card: A-
  • Digital Connectivity Index: 69 / 100
Benicia, CA

  • ISP Report Card: B
  • Digital Connectivity Index: 86 / 100
Tormey, CA

  • ISP Report Card: C
  • Digital Connectivity Index: 81 / 100
Rodeo, CA

  • ISP Report Card: B+
  • Digital Connectivity Index: 88 / 100
Hercules, CA

  • ISP Report Card: B-
  • Digital Connectivity Index: 89 / 100
Vallejo, CA

  • ISP Report Card: B+
  • Digital Connectivity Index: 71 / 100
Martinez, CA

  • ISP Report Card: B+
  • Digital Connectivity Index: 81 / 100
Pinole, CA

  • ISP Report Card: B+
  • Digital Connectivity Index: 76 / 100
El Sobrante, CA

  • ISP Report Card: B+
  • Digital Connectivity Index: 88 / 100

How Much Speed does a Port Costa Household Need?

Higher speed is typically preferred, but that comes at a higher price. The average size of a household in Port Costa is 2.1, which is smaller than the California average of 3.0 and smaller than the national average of 2.7. Port Costa's average household income is $114,822 which is higher than the California average of $108,618 and much higher than the national average of $90,606. Homes with fewer people living in them and with higher incomes tend to indicate a fairly average device usage pattern.

Port Costa also has 10% of its population enrolled in school between the 6th grade and college level, this is lower than the California average of 17%. Additionally, 20% of residents work from home, which is higher than the 15% of residents in California who work from home. This and other factors you can see above show us that the community of Port Costa has a very high need for internet connectivity and speeds.

Compared to the rest of the country, Port Costa households are much more technology-engaged. 99% of households have some sort of computing device, 95% have desktops or laptops in the home, and 95% have smartphones. To see what speeds you are currently getting, please visit our internet speed test tool.

Which Fiber Internet Providers are Available in Port Costa?

According to the most recently submitted data by internet service providers to the FCC, there are currently no fiber providers available in Port Costa, CA.

Which Cable Internet Providers are Available in Port Costa?

XFINITY Cable in Port Costa, CA

XFINITY logo

Availability:

83.0%

Customer Rating:

3.3 of 5 stars

(1,910)

Avg. Download Speed

1,200 Mbps

XFINITY from Comcast offers Cable service to 83.0% of Port Costa homes. Across the city, XFINITY Cable is the only type of service available from the company, with speeds up to 1,200 Mbps, with speeds from 1,200 Mpbs up to 1,200 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 35 and as high as 35, with an average of 35 Mbps throughout the city. XFINITY Cable is rated about the same as other types of internet service available in Port Costa from XFINITY in terms of customer satisfaction.

Which DSL Internet Providers are Available in Port Costa?

EarthLink DSL in Port Costa, CA

EarthLink logo

Availability:

83.3%

Customer Rating:

3.8 of 5 stars

(4)

Avg. Download Speed

21 Mbps

EarthLink offers DSL service to 83.3% of Port Costa homes. Across the city, EarthLink DSL has speeds up to 21 Mbps, with speeds from 10 Mpbs up to 50 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 10, with an average of 3.5 Mbps throughout the city. EarthLink DSL is rated the same as other types of internet service available in Port Costa from EarthLink in terms of customer satisfaction.

AT&T DSL in Port Costa, CA

AT&T logo

Availability:

83.3%

Customer Rating:

3.3 of 5 stars

(304)

Avg. Download Speed

21 Mbps

AT&T offers DSL service to 83.3% of Port Costa homes. Across the city, AT&T DSL has speeds up to 21 Mbps, with speeds from 10 Mpbs up to 50 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 1.0 and as high as 10, with an average of 3.5 Mbps throughout the city. AT&T DSL is rated about the same as other types of internet service available in Port Costa from AT&T in terms of customer satisfaction.

Which Fixed Wireless and LTE Internet Providers are Available in Port Costa?

EarthLink Fixed Wireless in Port Costa, CA

EarthLink logo

Availability:

73.0%

Customer Rating:

 of 5 stars

(0)

Avg. Download Speed

25 Mbps

EarthLink offers Fixed Wireless service to 73.0% of Port Costa homes. Across the city, EarthLink Fixed Wireless has speeds up to 25 Mbps, with speeds from 25 Mpbs up to 25 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 3.0, with an average of 3.0 Mbps throughout the city. EarthLink Fixed Wireless is rated other types of internet service available in Port Costa from EarthLink in terms of customer satisfaction.

AT&T Fixed Wireless in Port Costa, CA

AT&T logo

Availability:

73.0%

Customer Rating:

 of 5 stars

(0)

Avg. Download Speed

25 Mbps

AT&T offers Fixed Wireless service to 73.0% of Port Costa homes. Across the city, AT&T Fixed Wireless has speeds up to 25 Mbps, with speeds from 25 Mpbs up to 25 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 3.0, with an average of 3.0 Mbps throughout the city. AT&T Fixed Wireless is rated other types of internet service available in Port Costa from AT&T in terms of customer satisfaction.

T-Mobile Home Internet Fixed Wireless in Port Costa, CA

T-Mobile Home Internet logo

Availability:

63.5%

Customer Rating:

 of 5 stars

(0)

Avg. Download Speed

26 Mbps

T-Mobile Home Internet offers Fixed Wireless service to 63.5% of Port Costa homes. Across the city, T-Mobile Home Internet Fixed Wireless is the only type of service available from the company, with speeds up to 26 Mbps, with speeds from 25 Mpbs up to 100 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 3.0 and as high as 20, with an average of 3.2 Mbps throughout the city. T-Mobile Home Internet Fixed Wireless is rated other types of internet service available in Port Costa from T-Mobile Home Internet in terms of customer satisfaction.

Verizon Fixed Wireless in Port Costa, CA

Verizon logo

Availability:

56.6%

Customer Rating:

 of 5 stars

(0)

Avg. Download Speed

300 Mbps

Verizon offers Fixed Wireless service to 56.6% of Port Costa homes. Across the city, Verizon Fixed Wireless is the only type of service available from the company, with speeds up to 300 Mbps, with speeds from 300 Mpbs up to 300 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 20 and as high as 20, with an average of 20 Mbps throughout the city. Verizon Fixed Wireless is rated other types of internet service available in Port Costa from Verizon in terms of customer satisfaction.

Unwired Fixed Wireless in Port Costa, CA

Unwired logo

Availability:

27.4%

Customer Rating:

 of 5 stars

(0)

Avg. Download Speed

300 Mbps

Unwired offers Fixed Wireless service to 27.4% of Port Costa homes. Across the city, Unwired Fixed Wireless is the only type of service available from the company, with speeds up to 300 Mbps, with speeds from 300 Mpbs up to 300 Mbps depending on the address. Upload speeds differ from download speeds, and are as low 25 and as high as 25, with an average of 25 Mbps throughout the city. Unwired Fixed Wireless is rated other types of internet service available in Port Costa from Unwired in terms of customer satisfaction.

Which ISP Should You Choose in Port Costa?

The right ISP for you depends upon your needs, but in general we can make the following suggestions:

  • The best all-around internet service provider in Port Costa is XFINITY.
  • The fastest internet provider should be XFINITY from Comcast. Considering speed for the money and reliability in speeds, XFINITY from Comcast may be a better choice based on real-world local customer feedback.
  • The most affordable internet provider in Port Costa is AT&T.
  • Viasat, HughesNet, EarthLink, and AT&T has the broadest coverage in Port Costa, and is most likely to cover your home. To find out exactly what's available at your home, please use our address search tool.

How does Port Costa compare to other cities with a similar population?

To see how Port Costa stacks up on the national level, it's useful to look at some other cities with similarly sized populations. Below you can see a list of these cities and how they compare to Port Costa's C- ISP Report Card and 74 / 100 Digital Connectivity Index.

Concord, NE

  • ISP Report Card: D+
  • Digital Connectivity Index: 50 / 100
Clopton, AL

  • ISP Report Card: C
  • Digital Connectivity Index: 20 / 100
Cloverland, IN

  • ISP Report Card: C+
  • Digital Connectivity Index: 46 / 100
Clymers, IN

  • ISP Report Card: D+
  • Digital Connectivity Index: 38 / 100
Coalton, IL

  • ISP Report Card: B+
  • Digital Connectivity Index: 48 / 100
Coalville, NC

  • ISP Report Card: C-
  • Digital Connectivity Index: 27 / 100
Cobalt, ID

  • ISP Report Card: C
  • Digital Connectivity Index: 74 / 100
Coburg, KY

  • ISP Report Card: B-
  • Digital Connectivity Index: 29 / 100
Coffey, MO

  • ISP Report Card: D
  • Digital Connectivity Index: 25 / 100

Customer Reviews

Customer Reviews for Internet Service Providers in California

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