In Johnston there is 1 residential Cable provider covering 99.06% of the city. The average home can get speeds up to 1,000 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 Cable 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
Cable 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 cable internet available?
Cable Internet Availability Key
Cable is available in 99.06% of Johnston. Areas in green have cable internet service, where areas in yellow or red may not. The most widely available provider is Mediacom. Call one of the companies with service in Johnston above to see who has service at your home.
How fast is cable internet in Johnston?
The map below shows maximum cable internet speeds by area in Johnston.
Cable Internet Speed Key
The average Johnston home can get up to 1,000 Mbps on their cable internet plan. The fastest cable download speed in the city is 1,000 Mbps, which 99.06% of residents can get.
Is cable 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 cable 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.
Cable 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.
Mediacom Cable in Johnston, IA
Mediacom cable coverage
About 99.06%, or 24,233 people, have Mediacom cable internet available to them in the city. The company covers the entire Johnston area. Mediacom is one of the largest internet service providers internet service providers in the US, with internet service available in most of Johnston.
Mediacom cable download speeds
Mediacom is above average when comparing download speeds to all other internet providers in Johnston. Versus other cable providers in the area, Mediacom cable is the fastest. There are no different maximum speeds throughout Johnston. The fastest plan anyone in Johnston can order from Mediacom goes up to 1,000 Mbps, and all Johnston customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Mediacom cable upload speeds
In Johnston download speeds tend to be faster than than upload speeds for Mediacom cable. Compared to other ISPs, Mediacom is below average where upload speeds are concerned, and the fastest compared to other Johnston cable providers. Mediacom offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Johnston is up to 50 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 50.0 Mbps
Johnston Cable 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 cable internet in Johnston compare to the rest of Iowa?
Cable internet speeds in Johnston are much faster versus the average speeds in Iowa: 0.00 Mbps in Iowa versus 1,000 Mbps in the city. The state has similar cable availability compared to the city. Average cable coverage in Iowa is 0.00% versus 99.06% in Johnston.
What zip codes have cable internet?
Cable 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 cable 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 cable coverage, similar speeds
- Urbandale, IA: more cable coverage, similar speeds
- Windsor Heights, IA: more cable coverage, similar speeds
- Clive, IA: more cable coverage, similar speeds
- Polk City, IA: less cable coverage, similar speeds
- Ankeny, IA: less cable coverage, similar speeds
- Granger, IA: less cable coverage, similar speeds
- West Des Moines, IA: more cable coverage, similar speeds
- Des Moines, IA: less cable coverage, slower speeds
- Waukee, IA: less cable coverage, similar speeds
Cities with Similar Populations
- Covington, KY: less cable coverage, similar speeds
- Versailles, KY: less cable coverage, similar speeds
- Vero Beach South, FL: more cable coverage, faster speeds
- University Park, TX: less cable coverage, similar speeds
- Union, KY: less cable coverage, similar speeds
- Tysons Corner, VA: less cable coverage, faster speeds
- Tullahoma, TN: less cable coverage, similar speeds
- Trussville, AL: less cable coverage, similar speeds
- Crofton, MD: more cable coverage, faster speeds
- Crescent City, CA: less cable coverage, similar speeds