In Johnston there is 1 residential DSL provider covering 96.43% of the city. The average home can get speeds up to 87 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 Johnston, IA.
To see availability maps for all providers including fiber, cable, DSL, and more in Johnston, IA please click below.
Johnston, IA Availability Maps
DSL Internet Service Provider in Johnston
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 Johnston are not shown.
Johnston 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 Johnston is DSL internet available?
DSL Internet Availability Key
DSL is available in 96.43% of Johnston. Areas in green have DSL internet service, where areas in yellow or red may not. The most widely available provider is Centurylink. Call one of the companies with service in Johnston above to see who has service at your home.
How fast is DSL internet in Johnston?
The map below shows maximum DSL internet speeds by area in Johnston.
DSL Internet Speed Key
The average Johnston home can get up to 87 Mbps on their DSL internet plan. The fastest DSL download speed in the city is 140 Mbps, which 17.14% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 7.55% of homes can only purchase plans up to 10 Mbps. See the internet provider details below for info about their speed and coverage in Johnston.
DSL internet speeds tend to be faster in the northwest parts of Johnston, and slower in the west areas of the city.
Is DSL the fastest internet I can get in Johnston?
The fastest internet for you may vary based on where in Johnston you live. In general, fiber competes most often with DSL in the city.
- Fiber is the fastest internet type for 93.71% of Johnston homes.
- Cable is fastest for 5.91% 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 Johnston homes.
DSL Providers in Depth
Below you'll find which TV and internet providers offer service in Johnston, along with details on where in Johnston and at what speeds.
Centurylink DSL in Johnston, IA
Centurylink DSL coverage
About 96.43%, or 23,591 people, have Centurylink DSL internet available to them in the city. The company covers the entire Johnston area. Centurylink is one of the largest internet service providers internet service providers in the US, with internet service available in most of Johnston.
Centurylink DSL download speeds
Centurylink is below average when comparing download speeds to all other internet providers in Johnston. Versus other DSL providers in the area, Centurylink DSL is the fastest. There are 7 different maximum speeds throughout Johnston. The fastest plan anyone in Johnston can order from Centurylink goes up to 140 Mbps, the slowest package only goes up to 10 Mbps, and the city-wide average maximum speed for Johnston customers is up to 87 Mbps.
Show all download speeds
- 17.8% up to 140.0 Mbps
- 1.1% up to 120.0 Mbps
- 36.1% up to 100.0 Mbps
- 21.2% up to 80.0 Mbps
- 2.5% up to 60.0 Mbps
- 13.5% up to 40.0 Mbps
- 7.8% up to 10.0 Mbps
Centurylink DSL upload speeds
In Johnston 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 fastest compared to other Johnston DSL providers. Centurylink offers 6 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 Johnston is up to 40 Mbps. Some customers have slower plan choices, which only go up to 1.0 Mbps. On average, Centurylink customers can get speeds up to 11 Mbps.
Show all upload speeds
- 4.8% up to 40.0 Mbps
- 16.1% up to 20.0 Mbps
- 55.3% up to 10.0 Mbps
- 3.4% up to 5.0 Mbps
- 12.6% up to 3.0 Mbps
- 7.8% up to 1.0 Mbps
Johnston DSL by Area
This information is most helpful to those looking for homes or considering moving to Johnston or any of the areas nearby.
How does DSL internet in Johnston compare to the rest of Iowa?
DSL internet speeds in Johnston are much faster versus the average speeds in Iowa: 0.00 Mbps in Iowa versus 87 Mbps in the city. The state has similar DSL availability compared to the city. Average DSL coverage in Iowa is 0.00% versus 96.43% in Johnston.
What zip codes have DSL internet?
DSL internet coverage varies by zip code and neighborhood. Some examples in or around Johnston 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
- Grimes, IA: less DSL coverage, faster speeds
- Urbandale, IA: more DSL coverage, slower speeds
- Windsor Heights, IA: less DSL coverage, faster speeds
- Clive, IA: more DSL coverage, faster speeds
- Polk City, IA: less DSL coverage, slower speeds
- Ankeny, IA: less DSL coverage, slower speeds
- Granger, IA: more DSL coverage, slower speeds
- West Des Moines, IA: less DSL coverage, faster speeds
- Des Moines, IA: less DSL coverage, slower speeds
- Waukee, IA: less DSL coverage, slower speeds
Cities with Similar Populations
- Covington, KY: less DSL coverage, slower speeds
- Versailles, KY: more DSL coverage, faster speeds
- Vero Beach South, FL: less DSL coverage, slower speeds
- University Park, TX: less DSL coverage, slower speeds
- Union, KY: less DSL coverage, slower speeds
- Tullahoma, TN: less DSL coverage, slower speeds
- Trussville, AL: less DSL coverage, slower speeds
- Crescent City, CA: less DSL coverage, slower speeds
- Crawfordville, FL: more DSL coverage, slower speeds
- Vidor, TX: less DSL coverage, slower speeds