In Contra Costa County there are 9 residential internet providers covering 99.81% of the county. The average home can get speeds up to 1,025 Mbps. Note that we may have a financial relationship with some of the providers below. This does not influence rankings, and helps us provide high-quality detailed information for free.
9 Internet Service Providers in Contra Costa County
To avoid wasting your time, providers with less than 1% coverage in Contra Costa County are not shown.
Contra Costa County Satellite TV & Internet Providers
DISH Satellite TV
DIRECTV Satellite TV
Not sure whether to choose Dish or DIRECTV? For most people most of the time we recommend DISH. But click here to learn more.
HughesNet Satellite Internet
Where in Contra Costa County is internet available?
Internet Availability Key
Internet service is available in 99.81% of Contra Costa County. Areas in green are more likely to have fiber, cable, DSL, or fixed wireless internet service. Areas in red may be more reliant on satellite service. The most widely available provider is XFINITY. Call one of the companies with service in Contra Costa County above to see who has service at your home, or click the technology to see where it can be found in Contra Costa County.
How fast are internet speeds in Contra Costa County?
The map below shows maximum internet speeds by area in Contra Costa County.
Internet Speed Key
The average Contra Costa County home can get up to 1,025 Mbps on their internet plan. For most people, the fastest download speed in the county is 2,000 Mbps, which 3.67% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, less than 1% of homes can only purchase plans up to 0.77 Mbps. See the internet provider details below for info about their speed and coverage in Contra Costa County.
Internet speeds tend to be faster in the east parts of Contra Costa County, and slower in the south areas of the county.
What type of internet should I choose in Contra Costa County?
The fastest internet for you may vary based on where in Contra Costa County you live. If speed is your main concern, cable will be the fastest internet in the county.
- Fiber is the fastest internet type for 38.73% of Contra Costa County homes.
- Cable is fastest for 59.82% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 1.05%.
- Satellite internet may be the only option for less than 1% of Contra Costa County homes.
Internet Market Health in Contra Costa County
Internet Competition Key
The map shows how competitive the Contra Costa County internet service market is. Areas in green have more alternatives, areas in yellow have a few choices, and areas in red may have only one provider. More competition usually means faster speeds and better prices for you, the customer.
Below are quick facts on internet competition and market health in Contra Costa County based on what connections the average home has availabile:
- Average number of internet service providers to a home: 3.7 (healthy)
- Average types of service (fiber, cable, DSL, etc): 3.1 (very healthy)
- Average providers with broadband (25 Mbps+) speeds: 3.5 (very healthy)
Overall, competition is very healthy.
Contra Costa County internet customers have the ability to buy internet service from 1 to 8 different providers, depending on where they live. For different types of service, Contra Costa County homes have between 1 and 4 options. The type(s) of service available are cable, dsl, fixed wireless, and fiber, though these may vary depending on the region within the county.
When it comes to broadband download speeds faster than 25 Mbps, the situation is worse. Contra Costa County internet customers who want faster speeds have between 0 and 8 choices of companies offering speeds up to or over 25 Mbps.
More internet companies with faster speeds means fewer monopolies and better prices for customers. In promoting a free market for internet, Contra Costa County is doing quite well.
TV & Internet Providers in Depth
Below you'll find which TV and internet providers offer service in Contra Costa County, along with details on where in Contra Costa County and at what speeds.
XFINITY from Comcast Cable in Contra Costa County, CA
XFINITY cable coverage
About 98.22%, or 1,030,357 people, have XFINITY cable internet available to them in the county. The company covers the entire Contra Costa County area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in most of Contra Costa County.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in Contra Costa County. Versus other cable providers in the area, XFINITY cable is the fastest. There are no different maximum speeds throughout Contra Costa County. The fastest plan anyone in Contra Costa County can order from XFINITY goes up to 1,000 Mbps, and all Contra Costa County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
XFINITY from Comcast cable upload speeds
In Contra Costa County download speeds tend to be than upload speeds for XFINITY cable. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the fastest compared to other Contra Costa County cable providers. XFINITY offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Contra Costa County is up to 35 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 35.0 Mbps
AT&T DSL in Contra Costa County, CA
AT&T DSL coverage
About 95.41%, or 1,000,885 people, have AT&T DSL internet available to them in the county. The company covers the entire Contra Costa County area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in most of Contra Costa County.
AT&T DSL download speeds
AT&T is below average when comparing download speeds to all other internet providers in Contra Costa County. Versus other DSL providers in the area, AT&T DSL is below average. There are 12 different maximum speeds throughout Contra Costa County. The fastest plan anyone in Contra Costa County can order from AT&T goes up to 100 Mbps, the slowest package only goes up to 0.77 Mbps, and the county-wide average maximum speed for Contra Costa County customers is up to 71 Mbps.
Show all download speeds
- 53.4% up to 100.0 Mbps
- 10.7% up to 75.0 Mbps
- 13.7% up to 50.0 Mbps
- 4.5% up to 25.0 Mbps
- 6.6% up to 18.0 Mbps
- 2.2% up to 12.0 Mbps
- 1.2% up to 10.0 Mbps
- 4.2% up to 6.0 Mbps
- 0.5% up to 5.0 Mbps
- 1.6% up to 3.0 Mbps
- 1.0% up to 1.5 Mbps
- 0.5% up to 0.8 Mbps
AT&T DSL upload speeds
In Contra Costa County download speeds tend to be than upload speeds for AT&T DSL. Compared to other ISPs, AT&T is below average where upload speeds are concerned, and below average compared to other Contra Costa County DSL providers. AT&T offers 9 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood. The fastest upload speed available to anyone from this ISP in Contra Costa County is up to 20 Mbps. Some customers have slower plan choices, which only go up to 0.26 Mbps. On average, AT&T customers can get speeds up to 15 Mbps.
Show all upload speeds
- 64.1% up to 20.0 Mbps
- 13.7% up to 10.0 Mbps
- 4.4% up to 5.0 Mbps
- 0.1% up to 2.0 Mbps
- 8.8% up to 1.5 Mbps
- 6.1% up to 1.0 Mbps
- 1.8% up to 0.5 Mbps
- 0.8% up to 0.4 Mbps
- 0.2% up to 0.3 Mbps
AT&T Fiber in Contra Costa County, CA
AT&T fiber coverage
About 31.35%, or 328,911 people, have AT&T fiber internet available to them in the county. The company covers the entire Contra Costa County area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Contra Costa County.
AT&T fiber download speeds
AT&T is above average when comparing download speeds to all other internet providers in Contra Costa County. Versus other fiber providers in the area, AT&T fiber is the slowest. There are 3 different maximum speeds throughout Contra Costa County. The fastest plan anyone in Contra Costa County can order from AT&T goes up to 1,000 Mbps, the slowest package only goes up to 75 Mbps, and the county-wide average maximum speed for Contra Costa County customers is up to 999 Mbps.
Show all download speeds
- 99.9% up to 1,000.0 Mbps
- 0.0% up to 500.0 Mbps
- 0.1% up to 75.0 Mbps
AT&T fiber upload speeds
In Contra Costa County download speeds tend to be than upload speeds for AT&T fiber. Compared to other ISPs, AT&T is above average where upload speeds are concerned, and the slowest compared to other Contra Costa County fiber providers. AT&T offers 3 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood. The fastest upload speed available to anyone from this ISP in Contra Costa County is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 8.0 Mbps. On average, AT&T customers can get speeds up to 999 Mbps.
Show all upload speeds
- 99.9% up to 1,000.0 Mbps
- 0.0% up to 100.0 Mbps
- 0.1% up to 8.0 Mbps
Astound Broadband powered by Wave Broadband Cable in Contra Costa County, CA
Astound Broadband cable coverage
About 23.63%, or 247,855 people, have Astound Broadband cable internet available to them in the county. The company covers the central, south, north, northwest, southwest, west, and east Contra Costa County area. Astound Broadband is a large internet service provider internet service providers in the US, with internet service available in a small portion of Contra Costa County.
Astound Broadband powered by Wave Broadband cable download speeds
Astound Broadband is above average when comparing download speeds to all other internet providers in Contra Costa County. Versus other cable providers in the area, Astound Broadband cable is the slowest. There are 2 different maximum speeds throughout Contra Costa County. The fastest plan anyone in Contra Costa County can order from Astound Broadband goes up to 1,000 Mbps, the slowest package only goes up to 250 Mbps, and the county-wide average maximum speed for Contra Costa County customers is up to 792 Mbps.
Show all download speeds
- 72.3% up to 1,000.0 Mbps
- 27.7% up to 250.0 Mbps
Astound Broadband powered by Wave Broadband cable upload speeds
In Contra Costa County download speeds tend to be than upload speeds for Astound Broadband cable. Compared to other ISPs, Astound Broadband is below average where upload speeds are concerned, and the slowest compared to other Contra Costa County cable providers. Astound Broadband offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Contra Costa County is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
sonic DSL in Contra Costa County, CA
sonic DSL coverage
About 8.71%, or 91,376 people, have sonic DSL internet available to them in the county. The company covers the entire Contra Costa County area. sonic is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Contra Costa County.
sonic DSL download speeds
sonic is below average when comparing download speeds to all other internet providers in Contra Costa County. Versus other DSL providers in the area, sonic DSL is below average. There are 3 different maximum speeds throughout Contra Costa County. The fastest plan anyone in Contra Costa County can order from sonic goes up to 80 Mbps, the slowest package only goes up to 12 Mbps, and the county-wide average maximum speed for Contra Costa County customers is up to 54 Mbps.
Show all download speeds
- 36.3% up to 80.0 Mbps
- 60.5% up to 40.0 Mbps
- 3.3% up to 12.0 Mbps
sonic DSL upload speeds
In Contra Costa County download speeds tend to be than upload speeds for sonic DSL. Compared to other ISPs, sonic is below average where upload speeds are concerned, and below average compared to other Contra Costa County DSL providers. sonic offers 2 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood. The fastest upload speed available to anyone from this ISP in Contra Costa County is up to 20 Mbps. Some customers have slower plan choices, which only go up to 12 Mbps. On average, sonic customers can get speeds up to 15 Mbps.
Show all upload speeds
- 36.3% up to 20.0 Mbps
- 63.7% up to 12.0 Mbps
Astound Broadband powered by Wave Broadband Fiber in Contra Costa County, CA
Astound Broadband fiber coverage
About 6.91%, or 72,475 people, have Astound Broadband fiber internet available to them in the county. The company covers the central, south, north, northwest, and east Contra Costa County area. Astound Broadband is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Contra Costa County.
Astound Broadband powered by Wave Broadband fiber download speeds
Astound Broadband is above average when comparing download speeds to all other internet providers in Contra Costa County. Versus other fiber providers in the area, Astound Broadband fiber is below average. There are no different maximum speeds throughout Contra Costa County. The fastest plan anyone in Contra Costa County can order from Astound Broadband goes up to 1,000 Mbps, and all Contra Costa County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Astound Broadband powered by Wave Broadband fiber upload speeds
In Contra Costa County download speeds tend to be than upload speeds for Astound Broadband fiber. Compared to other ISPs, Astound Broadband is one of the fastest where upload speeds are concerned, and one of the fastest compared to other Contra Costa County fiber providers. Astound Broadband offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Contra Costa County is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
sonic Fiber in Contra Costa County, CA
sonic fiber coverage
About 3.67%, or 38,551 people, have sonic fiber internet available to them in the county. The company covers the east, southeast, and southwest Contra Costa County area. sonic is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Contra Costa County.
sonic fiber download speeds
sonic is the fastest when comparing download speeds to all other internet providers in Contra Costa County. Versus other fiber providers in the area, sonic fiber is the fastest. There are no different maximum speeds throughout Contra Costa County. The fastest plan anyone in Contra Costa County can order from sonic goes up to 2,000 Mbps, and all Contra Costa County customers can get this speed.
Show all download speeds
- 100.0% up to 2,000.0 Mbps
sonic fiber upload speeds
In Contra Costa County download speeds tend to be than upload speeds for sonic fiber. Compared to other ISPs, sonic is one of the fastest where upload speeds are concerned, and one of the fastest compared to other Contra Costa County fiber providers. sonic offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Contra Costa County is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Etheric Networks Fixed Wireless in Contra Costa County, CA
Etheric Networks fixed wireless coverage
About 62.62%, or 656,932 people, have Etheric Networks fixed wireless internet available to them in the county. The company covers the south, west, central, southwest, northwest, southeast, north, and east Contra Costa County area. Etheric Networks is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Contra Costa County.
Etheric Networks fixed wireless download speeds
Etheric Networks is below average when comparing download speeds to all other internet providers in Contra Costa County. Versus other fixed wireless providers in the area, Etheric Networks fixed wireless is above average. There are 2 different maximum speeds throughout Contra Costa County. The fastest plan anyone in Contra Costa County can order from Etheric Networks goes up to 150 Mbps, the slowest package only goes up to 80 Mbps, and the county-wide average maximum speed for Contra Costa County customers is up to 104 Mbps.
Show all download speeds
- 33.9% up to 150.0 Mbps
- 66.1% up to 80.0 Mbps
Etheric Networks fixed wireless upload speeds
In Contra Costa County download speeds tend to be than upload speeds for Etheric Networks fixed wireless. Compared to other ISPs, Etheric Networks is below average where upload speeds are concerned, and above average compared to other Contra Costa County fixed wireless providers. Etheric Networks offers 2 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood. The fastest upload speed available to anyone from this ISP in Contra Costa County is up to 150 Mbps. Some customers have slower plan choices, which only go up to 80 Mbps. On average, Etheric Networks customers can get speeds up to 104 Mbps.
Show all upload speeds
- 33.9% up to 150.0 Mbps
- 66.1% up to 80.0 Mbps
T-Mobile Home Internet in Contra Costa County, CA
T-Mobile Home Internet fixed wireless coverage
About 35.59%, or 373,345 people, have T-Mobile Home Internet fixed wireless internet available to them in the county. The company covers the entire Contra Costa County area. T-Mobile Home Internet is one of the largest internet service providers internet service providers in the US, with internet service available in some of Contra Costa County.
T-Mobile Home Internet fixed wireless download speeds
T-Mobile Home Internet is below average when comparing download speeds to all other internet providers in Contra Costa County. Versus other fixed wireless providers in the area, T-Mobile Home Internet fixed wireless is below average. There are no different maximum speeds throughout Contra Costa County. The fastest plan anyone in Contra Costa County can order from T-Mobile Home Internet goes up to 25 Mbps, and all Contra Costa County customers can get this speed.
Show all download speeds
- 100.0% up to 25.0 Mbps
T-Mobile Home Internet fixed wireless upload speeds
In Contra Costa County download speeds tend to be than upload speeds for T-Mobile Home Internet fixed wireless. Compared to other ISPs, T-Mobile Home Internet is below average where upload speeds are concerned, and below average compared to other Contra Costa County fixed wireless providers. T-Mobile Home Internet offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Contra Costa County is up to 3.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 3.0 Mbps
Contra Costa County Internet by Area
This information is most helpful to those looking for homes or considering moving to Contra Costa County or any of the areas nearby.
How does internet in Contra Costa County compare to the rest of California?
Internet speeds in Contra Costa County are comparable versus the average speeds in California: 949 Mbps in California versus 1,025 Mbps in the county. The state has similar internet availability compared to the county. Average internet coverage in California is 99.64% versus 99.81% in Contra Costa County.
What zip codes have widespread internet?
Internet coverage varies by zip code and neighborhood. Some examples in or around Contra Costa County are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does internet service look like in other counties?
Below are counties nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Counties
- Alameda County, CA: more internet coverage, faster speeds
- Solano County, CA: less internet coverage, slower speeds
- San Francisco County, CA: more internet coverage, faster speeds
- Marin County, CA: less internet coverage, slower speeds
- San Mateo County, CA: more internet coverage, faster speeds
- Napa County, CA: less internet coverage, slower speeds
- San Joaquin County, CA: more internet coverage, slower speeds
- Santa Clara County, CA: more internet coverage, slower speeds
- Yolo County, CA: less internet coverage, slower speeds
- Sonoma County, CA: less internet coverage, faster speeds
Counties with Similar Populations
- Salt Lake County, UT: more internet coverage, faster speeds
- Fairfax County, VA: less internet coverage, slower speeds
- Travis County, TX: more internet coverage, slower speeds
- Montgomery County, MD: less internet coverage, slower speeds
- Hennepin County, MN: more internet coverage, faster speeds
- Allegheny County, PA: less internet coverage, faster speeds
- Mecklenburg County, NC: more internet coverage, slower speeds
- Franklin County, OH: more internet coverage, slower speeds
- St. Louis County, MO: more internet coverage, slower speeds
- Wake County, NC: more internet coverage, slower speeds