In Custer County there are 4 residential Fiber providers covering 96.45% of the county. The average home can get speeds up to 1,421 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.
This page contains all Fiber internet providers in Custer County, SD.
To see availability maps for all providers including fiber, cable, DSL, and more in Custer County, SD please click below.
Custer County, SD Availability Maps
Fiber Internet Service Providers in Custer 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 Custer County are not shown.
Custer 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
Where in Custer County is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 96.45% of Custer County. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is Golden West Telecommunications. Call one of the companies with service in Custer County above to see who has service at your home.
How fast is fiber internet in Custer County?
The map below shows maximum fiber internet speeds by area in Custer County.
Fiber Internet Speed Key
The average Custer County home can get up to 1,421 Mbps on their fiber internet plan. The fastest fiber download speed in the county is 5,000 Mbps, which 10.15% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 86.31% of homes can only purchase plans up to 1,000 Mbps. See the internet provider details below for info about their speed and coverage in Custer County.
Fiber internet speeds tend to be faster in the northeast parts of Custer County, and slower in the west areas of the county.
Is fiber the fastest internet I can get in Custer County?
The fastest internet for you may vary based on where in Custer County you live. In general, fixed wireless competes most often with fiber in the county.
- Fiber is the fastest internet type for 96.45% of Custer County homes.
- Cable is fastest for less than 1% of the county.
- DSL is fastest for 1.49%.
- Fixed wireless is fastest for 1.59%.
- Satellite internet may be the only option for less than 1% of Custer County homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Custer County, along with details on where in Custer County and at what speeds.
Golden West Telecommunications Fiber in Custer County, SD
Golden West Telecommunications fiber coverage
About 69.96%, or 5,819 people, have Golden West Telecommunications fiber internet available to them in the county. The company covers the central, west, north, northwest, southwest, south, and southeast Custer County area. Golden West Telecommunications is a large internet service provider internet service providers in the US, with internet service available in much of Custer County.
Golden West Telecommunications fiber download speeds
Golden West Telecommunications is above average when comparing download speeds to all other internet providers in Custer County. Versus other fiber providers in the area, Golden West Telecommunications fiber is one of the slowest. There are no different maximum speeds throughout Custer County. The fastest plan anyone in Custer County can order from Golden West Telecommunications goes up to 1,000 Mbps, and all Custer County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Golden West Telecommunications fiber upload speeds
In Custer County download speeds tend to be equal to than upload speeds for Golden West Telecommunications fiber. Compared to other ISPs, Golden West Telecommunications is above average where upload speeds are concerned, and one of the slowest compared to other Custer County fiber providers. Golden West Telecommunications offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Custer 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
Mt. Rushmore Telephone Company Fiber in Custer County, SD
Mt. Rushmore Telephone Company fiber coverage
About 22.18%, or 1,845 people, have Mt. Rushmore Telephone Company fiber internet available to them in the county. The company covers the northeast, east, southeast, central, and north Custer County area. Mt. Rushmore Telephone Company is a small internet service provider internet service providers in the US, with internet service available in a small portion of Custer County.
Mt. Rushmore Telephone Company fiber download speeds
Mt. Rushmore Telephone Company is above average when comparing download speeds to all other internet providers in Custer County. Versus other fiber providers in the area, Mt. Rushmore Telephone Company fiber is one of the slowest. There are no different maximum speeds throughout Custer County. The fastest plan anyone in Custer County can order from Mt. Rushmore Telephone Company goes up to 1,000 Mbps, and all Custer County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Mt. Rushmore Telephone Company fiber upload speeds
In Custer County download speeds tend to be equal to than upload speeds for Mt. Rushmore Telephone Company fiber. Compared to other ISPs, Mt. Rushmore Telephone Company is above average where upload speeds are concerned, and one of the slowest compared to other Custer County fiber providers. Mt. Rushmore Telephone Company offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Custer 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
Midco Fiber in Custer County, SD
Midco fiber coverage
About 10.15%, or 844 people, have Midco fiber internet available to them in the county. The company covers the northeast Custer County area. Midco is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Custer County.
Midco fiber download speeds
Midco is the fastest when comparing download speeds to all other internet providers in Custer County. Versus other fiber providers in the area, Midco fiber is the fastest. There are no different maximum speeds throughout Custer County. The fastest plan anyone in Custer County can order from Midco goes up to 5,000 Mbps, and all Custer County customers can get this speed.
Show all download speeds
- 100.0% up to 5,000.0 Mbps
Midco fiber upload speeds
In Custer County download speeds tend to be equal to than upload speeds for Midco fiber. Compared to other ISPs, Midco is the fastest where upload speeds are concerned, and the fastest compared to other Custer County fiber providers. Midco offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Custer County is up to 5,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 5,000.0 Mbps
Range Fiber in Custer County, SD
Range fiber coverage
About 2.93%, or 244 people, have Range fiber internet available to them in the county. The company covers the west, southwest, and northwest Custer County area. Range is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Custer County.
Range fiber download speeds
Range is above average when comparing download speeds to all other internet providers in Custer County. Versus other fiber providers in the area, Range fiber is one of the slowest. There are no different maximum speeds throughout Custer County. The fastest plan anyone in Custer County can order from Range goes up to 1,000 Mbps, and all Custer County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Range fiber upload speeds
In Custer County download speeds tend to be equal to than upload speeds for Range fiber. Compared to other ISPs, Range is above average where upload speeds are concerned, and one of the slowest compared to other Custer County fiber providers. Range offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Custer 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
Custer County Fiber by Area
This information is most helpful to those looking for homes or considering moving to Custer County or any of the areas nearby.
How does fiber internet in Custer County compare to the rest of South Dakota?
Fiber internet speeds in Custer County are much faster versus the average speeds in South Dakota: 0.00 Mbps in South Dakota versus 1,421 Mbps in the county. The state has similar fiber availability compared to the county. Average fiber coverage in South Dakota is 0.00% versus 96.45% in Custer County.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Custer County are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does fiber internet 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
- Jackson County, SD: less fiber coverage, slower speeds
- Jones County, SD: more fiber coverage, slower speeds
- Brule County, SD: less fiber coverage, slower speeds
- Hot Springs County, WY: less fiber coverage, slower speeds
- Aurora County, SD: more fiber coverage, slower speeds
- Davison County, SD: more fiber coverage, slower speeds
- Hanson County, SD: less fiber coverage, slower speeds
- McCook County, SD: more fiber coverage, slower speeds
- Rock County, MN: less fiber coverage, slower speeds
- Teton County, ID: less fiber coverage, slower speeds
Counties with Similar Populations
- Amite County, MS: less fiber coverage, faster speeds
- Avery County, NC: less fiber coverage, faster speeds
- Benzie County, MI: less fiber coverage, slower speeds
- Bertie County, NC: less fiber coverage, faster speeds
- Wetzel County, WV: less fiber coverage, faster speeds
- Wayne County, IL: less fiber coverage, faster speeds
- Bosque County, TX: less fiber coverage, faster speeds
- Andrew County, MO: more fiber coverage, slower speeds
- Bledsoe County, TN: more fiber coverage, slower speeds
- Amelia County, VA: less fiber coverage, slower speeds