In Dewey County there are 5 residential internet providers covering 96.64% of the county. The average home can get speeds up to 258 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.
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5 Internet Service Providers in Dewey County
Data updated 11/14/2025, based on FCC data from 12/31/2024. This is the most current data available as of .
To avoid wasting your time, providers with less than 1% coverage in Dewey County are not shown.
Dewey 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.
Viasat Satellite Internet
Availability maps for all providers in Dewey County
Using the dropdown below, please select a provider. Green indicates nearly all homes have service, red indicates few homes have service, and blank indicates no service.
Please note some providers will take longer to load than others
Internet service is available in 96.64% of Dewey County. Using our interactive availability map, you can compare service areas for different providers, we include fiber, cable, DSL, or fixed wireless internet service for all providers who offer it. You will notice that some providers might be listed multiple times for each service. If you find no providers cover the location you're looking at, you can opt for satellite service. The most widely available provider is CRST. Now you can call companies in Dewey County with more confidence that they might be available.
How fast are internet speeds in Dewey County?
The map below shows maximum internet speeds by area in Dewey County.
Internet Speed Key
The average Dewey County home can get up to 258 Mbps on their internet plan. For most people, the fastest download speed in the county is 1,000 Mbps, which 1.03% 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 25 Mbps. See the internet provider details below for info about their speed and coverage in Dewey County.
Internet speeds tend to be faster in the northeast parts of Dewey County, and slower in the east areas of the county.
What type of internet should I choose in Dewey County?
The fastest internet for you may vary based on where in Dewey County you live. If speed is your main concern, fiber will be the fastest internet in the county.
- Fiber is the fastest internet type for 95.78% of Dewey County homes.
- Cable is fastest for less than 1% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for 3.36% of Dewey County homes.
Internet Market Health in Dewey County
Internet Competition Key
The map shows how competitive the Dewey 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 Dewey County based on what connections the average home has availabile:
- Average number of internet service providers to a home: 1.0 (very unhealthy)
- Average types of service (fiber, cable, DSL, etc): 1.0 (very unhealthy)
- Average providers with broadband (25 Mbps+) speeds: 1.0 (very unhealthy)
Overall, competition is very unhealthy.
Dewey County internet customers have the ability to buy internet service from 1 to 2 different providers, depending on where they live. For different types of service, Dewey County homes have between 1 and 2 options. The type(s) of service available are fiber and fixed wireless, 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 similar. Dewey County internet customers who want faster speeds have between 1 and 2 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, Dewey County badly needs improvement.
TV & Internet Providers in Depth
Below you'll find which TV and internet providers offer service in Dewey County, along with details on where in Dewey County and at what speeds.
Cheyenne River Sioux Tribe Telephone Authority (CRST) Fiber in Dewey County, SD
CRST fiber coverage
About 95.67%, or 5,012 people, have CRST fiber internet available to them in the county. The company covers the entire Dewey County area. CRST is a small internet service provider internet service providers in the US, with internet service available in most of Dewey County.
Cheyenne River Sioux Tribe Telephone Authority (CRST) fiber download speeds
CRST is average when comparing download speeds to all other internet providers in Dewey County. Versus other fiber providers in the area, CRST fiber is the slowest. There are no different maximum speeds throughout Dewey County. The fastest plan anyone in Dewey County can order from CRST goes up to 250 Mbps, and all Dewey County customers can get this speed.
Show all download speeds
- 100.0% up to 250.0 Mbps
Cheyenne River Sioux Tribe Telephone Authority (CRST) fiber upload speeds
In Dewey County download speeds tend to be faster than than upload speeds for CRST fiber. Compared to other ISPs, CRST is below average where upload speeds are concerned, and the slowest compared to other Dewey County fiber providers. CRST offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Dewey County is up to 100 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 100.0 Mbps
WRT Fiber in Dewey County, SD
WRT fiber coverage
About 1.03%, or 54 people, have WRT fiber internet available to them in the county. The company covers the northeast Dewey County area. WRT is an average-sized internet service provider internet service providers in the US, with internet service available in a very small piece of Dewey County.
WRT fiber download speeds
WRT is the fastest when comparing download speeds to all other internet providers in Dewey County. Versus other fiber providers in the area, WRT fiber is the fastest. There are no different maximum speeds throughout Dewey County. The fastest plan anyone in Dewey County can order from WRT goes up to 1,000 Mbps, and all Dewey County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
WRT fiber upload speeds
In Dewey County download speeds tend to be equal to than upload speeds for WRT fiber. Compared to other ISPs, WRT is the fastest where upload speeds are concerned, and the fastest compared to other Dewey County fiber providers. WRT offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Dewey 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
wispwest.net Fixed Wireless in Dewey County, SD
wispwest.net fixed wireless coverage
About 1.05%, or 55 people, have wispwest.net fixed wireless internet available to them in the county. The company covers the southeast Dewey County area. wispwest.net is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Dewey County.
wispwest.net fixed wireless download speeds
wispwest.net is below average when comparing download speeds to all other internet providers in Dewey County. Versus other fixed wireless providers in the area, wispwest.net fixed wireless is below average. There are no different maximum speeds throughout Dewey County. The fastest plan anyone in Dewey County can order from wispwest.net goes up to 50 Mbps, and all Dewey County customers can get this speed.
Show all download speeds
- 100.0% up to 50.0 Mbps
wispwest.net fixed wireless upload speeds
In Dewey County download speeds tend to be faster than than upload speeds for wispwest.net fixed wireless. Compared to other ISPs, wispwest.net is below average where upload speeds are concerned, and above average compared to other Dewey County fixed wireless providers. wispwest.net offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Dewey County is up to 10 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 10.0 Mbps
Dewey County Internet by Area
This information is most helpful to those looking for homes or considering moving to Dewey County or any of the areas nearby.
How does internet in Dewey County compare to the rest of South Dakota?
Internet speeds in Dewey County are slower versus the average speeds in South Dakota: 1,953 Mbps in South Dakota versus 258 Mbps in the county. The state has similar internet availability compared to the county. Average internet coverage in South Dakota is 98.12% versus 96.64% in Dewey County.
What zip codes have widespread internet?
Internet coverage varies by zip code and neighborhood. Some examples in or around Dewey 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
- Ziebach County, SD: more internet coverage, faster speeds
- Walworth County, SD: more internet coverage, faster speeds
- Sully County, SD: more internet coverage, faster speeds
- Potter County, SD: more internet coverage, faster speeds
- Edmunds County, SD: more internet coverage, faster speeds
- Faulk County, SD: more internet coverage, faster speeds
- Harding County, SD: more internet coverage, faster speeds
- Brown County, SD: more internet coverage, faster speeds
- Spink County, SD: more internet coverage, faster speeds
- Butte County, SD: more internet coverage, faster speeds
Counties with Similar Populations
- Pendleton County, KY: more internet coverage, faster speeds
- Jerauld County, SD: more internet coverage, faster speeds
- Jewell County, KS: more internet coverage, faster speeds
- Jim Hogg County, TX: more internet coverage, faster speeds
- Johnson County, GA: more internet coverage, faster speeds
- Johnson County, NE: more internet coverage, faster speeds
- Johnson County, WY: less internet coverage, faster speeds
- Johnston County, OK: more internet coverage, faster speeds
- Jones County, NC: more internet coverage, faster speeds
- Jones County, SD: more internet coverage, faster speeds