In Jefferson there are 2 residential DSL providers covering 52.86% of the city. The average home can get speeds up to 28 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 Jefferson, SD.
To see availability maps for all providers including fiber, cable, DSL, and more in Jefferson, SD please click below.
Jefferson, SD Availability Maps
DSL Internet Service Providers in Jefferson
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 Jefferson are not shown.
Jefferson 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 Jefferson is DSL internet available?
DSL Internet Availability Key
DSL is available in 52.86% of Jefferson. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Long Lines. Call one of the companies with service in Jefferson above to see who has service at your home.
How fast is DSL internet in Jefferson?
The map below shows maximum DSL internet speeds by area in Jefferson.
DSL Internet Speed Key
The average Jefferson home can get up to 28 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 60 Mbps, which 3.23% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 5.68% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Jefferson.
DSL internet speeds tend to be faster in the west parts of Jefferson, and slower in the south areas of the city.
Is DSL the fastest internet I can get in Jefferson?
The fastest internet for you may vary based on where in Jefferson you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 57.92% of Jefferson homes.
- Cable is fastest for 40.94% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for less than 1% of Jefferson homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Jefferson, along with details on where in Jefferson and at what speeds.
Long Lines DSL in Jefferson, SD
Long Lines DSL coverage
About 41.41%, or 795 people, have Long Lines DSL internet available to them in the city. The company covers the southeast, south, north, east, and southwest Jefferson area. Long Lines is a large internet service provider internet service providers in the US, with internet service available in some of Jefferson.
Long Lines DSL download speeds
Long Lines is below average when comparing download speeds to all other internet providers in Jefferson. Versus other DSL providers in the area, Long Lines DSL is the fastest. There are no different maximum speeds throughout Jefferson. The fastest plan anyone in Jefferson can order from Long Lines goes up to 25 Mbps, and all Jefferson customers can get this speed.
Show all download speeds
- 100.0% up to 25.0 Mbps
Long Lines DSL upload speeds
In Jefferson download speeds tend to be faster than than upload speeds for Long Lines DSL. Compared to other ISPs, Long Lines is below average where upload speeds are concerned, and the fastest compared to other Jefferson DSL providers. Long Lines offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Jefferson is up to 3.0 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 3.0 Mbps
Centurylink DSL in Jefferson, SD
Centurylink DSL coverage
About 41.35%, or 794 people, have Centurylink DSL internet available to them in the city. The company covers the south, southeast, west, northwest, and east Jefferson area. Centurylink is one of the largest internet service providers internet service providers in the US, with internet service available in some of Jefferson.
Centurylink DSL download speeds
Centurylink is below average when comparing download speeds to all other internet providers in Jefferson. Versus other DSL providers in the area, Centurylink DSL is the slowest. There are 3 different maximum speeds throughout Jefferson. The fastest plan anyone in Jefferson can order from Centurylink goes up to 60 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Jefferson customers is up to 19 Mbps.
Show all download speeds
- 7.8% up to 60.0 Mbps
- 17.1% up to 40.0 Mbps
- 75.1% up to 10.0 Mbps
Centurylink DSL upload speeds
In Jefferson download speeds tend to be faster than than upload speeds for Centurylink DSL. Compared to other ISPs, Centurylink is below average where upload speeds are concerned, and the slowest compared to other Jefferson DSL providers. Centurylink offers 3 different upload speeds across the city, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Jefferson is up to 5.0 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Centurylink customers can get speeds up to 1.7 Mbps.
Show all upload speeds
- 7.8% up to 5.0 Mbps
- 17.1% up to 3.0 Mbps
- 75.1% up to 1.0 Mbps
Jefferson DSL by Area
This information is most helpful to those looking for homes or considering moving to Jefferson or any of the areas nearby.
How does DSL internet in Jefferson compare to the rest of South Dakota?
DSL internet speeds in Jefferson are much faster versus the average speeds in South Dakota: 0.00 Mbps in South Dakota versus 28 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in South Dakota is 0.00% versus 52.86% in Jefferson.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Jefferson 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 cities?
Below are cities nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Cities
- North Sioux City, SD: more DSL coverage, faster speeds
- Ponca, NE: more DSL coverage, slower speeds
- Elk Point, SD: more DSL coverage, slower speeds
- Sioux City, IA: more DSL coverage, faster speeds
- South Sioux City, NE: more DSL coverage, faster speeds
- Millnerville, IA: less DSL coverage, faster speeds
- Junction City, SD: more DSL coverage, faster speeds
- Dakota City, NE: more DSL coverage, faster speeds
- Hinton, IA: less DSL coverage, faster speeds
- Richland, SD: less DSL coverage, slower speeds
Cities with Similar Populations
- Sherman, NY: more DSL coverage, slower speeds
- Dale, WI: less DSL coverage, slower speeds
- Cope, SC: less DSL coverage, faster speeds
- Colquitt, LA: less DSL coverage, slower speeds
- Colchester, IL: less DSL coverage, faster speeds
- Canaan, ME: less DSL coverage, slower speeds
- Morven, NC: more DSL coverage, faster speeds
- Newell, WV: more DSL coverage, slower speeds
- Mont Alto, PA: less DSL coverage, faster speeds
- Nora Springs, IA: less DSL coverage, faster speeds