In Columbia County there are 4 residential DSL providers covering 81.95% of the county. The average home can get speeds up to 45 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 DSL internet providers in Columbia County, WI.
To see availability maps for all providers including fiber, cable, DSL, and more in Columbia County, WI please click below.
Columbia County, WI Availability Maps
DSL Internet Service Providers in Columbia 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 Columbia County are not shown.
Columbia 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 Columbia County is DSL internet available?
DSL Internet Availability Key
DSL is available in 81.95% of Columbia County. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Frontier. Call one of the companies with service in Columbia County above to see who has service at your home.
How fast is DSL internet in Columbia County?
The map below shows maximum DSL internet speeds by area in Columbia County.
DSL Internet Speed Key
The average Columbia County home can get up to 45 Mbps on their DSL internet plan. The fastest DSL download speed in the county is 115 Mbps, which 7.47% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 43.47% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Columbia County.
DSL internet speeds tend to be faster in the central parts of Columbia County, and slower in the southeast areas of the county.
Is DSL the fastest internet I can get in Columbia County?
The fastest internet for you may vary based on where in Columbia County you live. In general, cable competes most often with DSL in the county.
- Fiber is the fastest internet type for 41.67% of Columbia County homes.
- Cable is fastest for 42.09% of the county.
- DSL is fastest for 1.58%.
- Fixed wireless is fastest for 14.26%.
- Satellite internet may be the only option for less than 1% of Columbia County homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Columbia County, along with details on where in Columbia County and at what speeds.
Frontier Communications DSL in Columbia County, WI
Frontier DSL coverage
About 45.22%, or 26,452 people, have Frontier DSL internet available to them in the county. The company covers the entire Columbia County area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in some of Columbia County.
Frontier Communications DSL download speeds
Frontier is below average when comparing download speeds to all other internet providers in Columbia County. Versus other DSL providers in the area, Frontier DSL is above average. There are 5 different maximum speeds throughout Columbia County. The fastest plan anyone in Columbia County can order from Frontier goes up to 115 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Columbia County customers is up to 44 Mbps.
Show all download speeds
- 16.5% up to 115.0 Mbps
- 13.1% up to 90.0 Mbps
- 7.6% up to 70.0 Mbps
- 5.7% up to 45.0 Mbps
- 57.1% up to 10.0 Mbps
Frontier Communications DSL upload speeds
In Columbia County download speeds tend to be faster than than upload speeds for Frontier DSL. Compared to other ISPs, Frontier is below average where upload speeds are concerned, and average compared to other Columbia County DSL providers. Frontier offers 4 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 Columbia County is up to 7.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Frontier customers can get speeds up to 2.8 Mbps.
Show all upload speeds
- 16.5% up to 7.0 Mbps
- 13.1% up to 5.0 Mbps
- 13.3% up to 3.0 Mbps
- 57.1% up to 1.0 Mbps
Brightspeed DSL in Columbia County, WI
Brightspeed DSL coverage
About 29.62%, or 17,326 people, have Brightspeed DSL internet available to them in the county. The company covers the south, central, northeast, southeast, east, west, southwest, and north Columbia County area. Brightspeed is one of the largest internet service providers internet service providers in the US, with internet service available in a small portion of Columbia County.
Brightspeed DSL download speeds
Brightspeed is below average when comparing download speeds to all other internet providers in Columbia County. Versus other DSL providers in the area, Brightspeed DSL is the fastest. There are 5 different maximum speeds throughout Columbia County. The fastest plan anyone in Columbia County can order from Brightspeed goes up to 100 Mbps, the slowest package only goes up to 10 Mbps, and the county-wide average maximum speed for Columbia County customers is up to 55 Mbps.
Show all download speeds
- 29.7% up to 100.0 Mbps
- 16.7% up to 80.0 Mbps
- 5.0% up to 60.0 Mbps
- 13.9% up to 40.0 Mbps
- 34.8% up to 10.0 Mbps
Brightspeed DSL upload speeds
In Columbia County download speeds tend to be faster than than upload speeds for Brightspeed DSL. Compared to other ISPs, Brightspeed is below average where upload speeds are concerned, and the fastest compared to other Columbia County DSL providers. Brightspeed offers 4 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 Columbia County is up to 10 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Brightspeed customers can get speeds up to 5.6 Mbps.
Show all upload speeds
- 46.4% up to 10.0 Mbps
- 5.0% up to 5.0 Mbps
- 13.9% up to 3.0 Mbps
- 34.8% up to 1.0 Mbps
AT&T DSL in Columbia County, WI
AT&T DSL coverage
About 8.17%, or 4,780 people, have AT&T DSL internet available to them in the county. The company covers the southeast Columbia County area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Columbia County.
AT&T DSL download speeds
AT&T is one of the slowest when comparing download speeds to all other internet providers in Columbia County. Versus other DSL providers in the area, AT&T DSL is one of the slowest. There are no different maximum speeds throughout Columbia County. The fastest plan anyone in Columbia County can order from AT&T goes up to 10 Mbps, and all Columbia County customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
AT&T DSL upload speeds
In Columbia County download speeds tend to be faster than than upload speeds for AT&T DSL. Compared to other ISPs, AT&T is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Columbia County DSL providers. AT&T offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Columbia County is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
EarthLink DSL in Columbia County, WI
EarthLink DSL coverage
About 8.17%, or 4,780 people, have EarthLink DSL internet available to them in the county. The company covers the southeast Columbia County area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Columbia County.
EarthLink DSL download speeds
EarthLink is one of the slowest when comparing download speeds to all other internet providers in Columbia County. Versus other DSL providers in the area, EarthLink DSL is one of the slowest. There are no different maximum speeds throughout Columbia County. The fastest plan anyone in Columbia County can order from EarthLink goes up to 10 Mbps, and all Columbia County customers can get this speed.
Show all download speeds
- 100.0% up to 10.0 Mbps
EarthLink DSL upload speeds
In Columbia County download speeds tend to be faster than than upload speeds for EarthLink DSL. Compared to other ISPs, EarthLink is one of the slowest where upload speeds are concerned, and one of the slowest compared to other Columbia County DSL providers. EarthLink offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Columbia County is up to 1.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1.0 Mbps
Columbia County DSL by Area
This information is most helpful to those looking for homes or considering moving to Columbia County or any of the areas nearby.
How does DSL internet in Columbia County compare to the rest of Wisconsin?
DSL internet speeds in Columbia County are much faster versus the average speeds in Wisconsin: 0.00 Mbps in Wisconsin versus 45 Mbps in the county. The state has similar DSL availability compared to the county. Average DSL coverage in Wisconsin is 0.00% versus 81.95% in Columbia County.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Columbia County are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does DSL 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
- Sauk County, WI: more DSL coverage, slower speeds
- Dodge County, WI: less DSL coverage, slower speeds
- Richland County, WI: less DSL coverage, faster speeds
- Washington County, WI: more DSL coverage, faster speeds
- Ozaukee County, WI: more DSL coverage, faster speeds
- Howard County, IA: more DSL coverage, faster speeds
- Mitchell County, IA: less DSL coverage, faster speeds
- Newaygo County, MI: less DSL coverage, slower speeds
- Worth County, IA: less DSL coverage, slower speeds
- Winnebago County, IA: less DSL coverage, faster speeds
Counties with Similar Populations
- Effingham County, GA: less DSL coverage, faster speeds
- Somerset County, ME: less DSL coverage, faster speeds
- Jackson County, AL: less DSL coverage, slower speeds
- Henry County, VA: more DSL coverage, slower speeds
- Henry County, IN: less DSL coverage, slower speeds
- Henry County, IL: less DSL coverage, slower speeds
- Hamblen County, TN: more DSL coverage, slower speeds
- Hall County, NE: more DSL coverage, slower speeds
- Grundy County, IL: less DSL coverage, slower speeds
- Genesee County, NY: less DSL coverage, faster speeds