In South Jacksonville there are 4 residential Fiber providers covering 97.23% of the city. The average home can get speeds up to 6,570 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 South Jacksonville, IL.
To see availability maps for all providers including fiber, cable, DSL, and more in South Jacksonville, IL please click below.
South Jacksonville, IL Availability Maps
Fiber Internet Service Providers in South Jacksonville
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 South Jacksonville are not shown.
South Jacksonville 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 South Jacksonville is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 97.23% of South Jacksonville. Areas in green have fiber 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 South Jacksonville above to see who has service at your home.
How fast is fiber internet in South Jacksonville?
The map below shows maximum fiber internet speeds by area in South Jacksonville.
Fiber Internet Speed Key
The average South Jacksonville home can get up to 6,570 Mbps on their fiber internet plan. The fastest fiber download speed in the city is 7,000 Mbps, which 90.27% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 6.97% 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 South Jacksonville.
Fiber internet speeds tend to be faster in the west parts of South Jacksonville, and slower in the southeast areas of the city.
Is fiber the fastest internet I can get in South Jacksonville?
The fastest internet for you may vary based on where in South Jacksonville you live. In general, fixed wireless competes most often with fiber in the city.
- Fiber is the fastest internet type for 97.23% of South Jacksonville homes.
- Cable is fastest for less than 1% of the city.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for 2.66%.
- Satellite internet may be the only option for less than 1% of South Jacksonville homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in South Jacksonville, along with details on where in South Jacksonville and at what speeds.
CASSCOMM Fiber in South Jacksonville, IL
CASSCOMM fiber coverage
About 92.33%, or 3,539 people, have CASSCOMM fiber internet available to them in the city. The company covers the entire South Jacksonville area. CASSCOMM is a large internet service provider internet service providers in the US, with internet service available in most of South Jacksonville.
CASSCOMM fiber download speeds
CASSCOMM is above average when comparing download speeds to all other internet providers in South Jacksonville. Versus other fiber providers in the area, CASSCOMM fiber is one of the slowest. There are no different maximum speeds throughout South Jacksonville. The fastest plan anyone in South Jacksonville can order from CASSCOMM goes up to 1,000 Mbps, and all South Jacksonville customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
CASSCOMM fiber upload speeds
In South Jacksonville download speeds tend to be equal to than upload speeds for CASSCOMM fiber. Compared to other ISPs, CASSCOMM is above average where upload speeds are concerned, and one of the slowest compared to other South Jacksonville fiber providers. CASSCOMM offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in South Jacksonville is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Frontier Communications Fiber in South Jacksonville, IL
Frontier fiber coverage
About 90.27%, or 3,460 people, have Frontier fiber internet available to them in the city. The company covers the entire South Jacksonville area. Frontier is one of the largest internet service providers internet service providers in the US, with internet service available in most of South Jacksonville.
Frontier Communications fiber download speeds
Frontier is the fastest when comparing download speeds to all other internet providers in South Jacksonville. Versus other fiber providers in the area, Frontier fiber is the fastest. There are no different maximum speeds throughout South Jacksonville. The fastest plan anyone in South Jacksonville can order from Frontier goes up to 7,000 Mbps, and all South Jacksonville customers can get this speed.
Show all download speeds
- 100.0% up to 7,000.0 Mbps
Frontier Communications fiber upload speeds
In South Jacksonville download speeds tend to be equal to than upload speeds for Frontier fiber. Compared to other ISPs, Frontier is the fastest where upload speeds are concerned, and the fastest compared to other South Jacksonville fiber providers. Frontier offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in South Jacksonville is up to 7,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 7,000.0 Mbps
i3 Broadband Fiber in South Jacksonville, IL
i3 Broadband fiber coverage
About 51.97%, or 1,992 people, have i3 Broadband fiber internet available to them in the city. The company covers the southwest, central, south, southeast, north, east, west, and northeast South Jacksonville area. i3 Broadband is a large internet service provider internet service providers in the US, with internet service available in a majority of South Jacksonville.
i3 Broadband fiber download speeds
i3 Broadband is above average when comparing download speeds to all other internet providers in South Jacksonville. Versus other fiber providers in the area, i3 Broadband fiber is one of the slowest. There are no different maximum speeds throughout South Jacksonville. The fastest plan anyone in South Jacksonville can order from i3 Broadband goes up to 1,000 Mbps, and all South Jacksonville customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
i3 Broadband fiber upload speeds
In South Jacksonville download speeds tend to be equal to than upload speeds for i3 Broadband fiber. Compared to other ISPs, i3 Broadband is above average where upload speeds are concerned, and one of the slowest compared to other South Jacksonville fiber providers. i3 Broadband offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in South Jacksonville is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Illinois Electric Cooperative Fiber in South Jacksonville, IL
Illinois Net fiber coverage
About 2.64%, or 101 people, have Illinois Net fiber internet available to them in the city. The company covers the southwest, south, and southeast South Jacksonville area. Illinois Net is a large internet service provider internet service providers in the US, with internet service available in a very small piece of South Jacksonville.
Illinois Electric Cooperative fiber download speeds
Illinois Net is above average when comparing download speeds to all other internet providers in South Jacksonville. Versus other fiber providers in the area, Illinois Net fiber is one of the slowest. There are no different maximum speeds throughout South Jacksonville. The fastest plan anyone in South Jacksonville can order from Illinois Net goes up to 1,000 Mbps, and all South Jacksonville customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Illinois Electric Cooperative fiber upload speeds
In South Jacksonville download speeds tend to be equal to than upload speeds for Illinois Net fiber. Compared to other ISPs, Illinois Net is above average where upload speeds are concerned, and one of the slowest compared to other South Jacksonville fiber providers. Illinois Net offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in South Jacksonville is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
South Jacksonville Fiber by Area
This information is most helpful to those looking for homes or considering moving to South Jacksonville or any of the areas nearby.
How does fiber internet in South Jacksonville compare to the rest of Illinois?
Fiber internet speeds in South Jacksonville are much faster versus the average speeds in Illinois: 0.00 Mbps in Illinois versus 6,570 Mbps in the city. The state has similar fiber availability compared to the city. Average fiber coverage in Illinois is 0.00% versus 97.23% in South Jacksonville.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around South Jacksonville 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 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
- Jacksonville, IL: less fiber coverage, slower speeds
- Woodson, IL: less fiber coverage, slower speeds
- Lynnville, IL: less fiber coverage, slower speeds
- Murrayville, IL: less fiber coverage, slower speeds
- Alexander, IL: less fiber coverage, slower speeds
- Literberry, IL: less fiber coverage, slower speeds
- Chapin, IL: less fiber coverage, slower speeds
- Concord, IL: less fiber coverage, slower speeds
- Orleans, IL: less fiber coverage, slower speeds
- Nortonville, IL: less fiber coverage, slower speeds
Cities with Similar Populations
- Richmond, IL: less fiber coverage, faster speeds
- Palmyra, VA: less fiber coverage, slower speeds
- Starr, SC: less fiber coverage, faster speeds
- Palo Cedro, CA: less fiber coverage, slower speeds
- Riverton, IL: less fiber coverage, slower speeds
- Riverside, MO: less fiber coverage, faster speeds
- Riverdale, MD: more fiber coverage, slower speeds
- River Falls, AL: more fiber coverage, slower speeds
- Riva, MD: more fiber coverage, slower speeds
- Rio Bravo, TX: less fiber coverage, slower speeds