In Sullivans Island there are 2 residential Cable providers covering 100.00% of the city. The average home can get speeds up to 1,766 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 Sullivans Island, SC.
To see availability maps for all providers including fiber, cable, DSL, and more in Sullivans Island, SC please click below.
Sullivans Island, SC Availability Maps
Cable Internet Service Providers in Sullivans Island
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 Sullivans Island are not shown.
Sullivans Island 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 Sullivans Island is cable internet available?
Cable Internet Availability Key
Cable is available in 100.00% of Sullivans Island. Areas in green have cable internet service, where areas in yellow or red may not. The most widely available provider is XFINITY. Call one of the companies with service in Sullivans Island above to see who has service at your home.
How fast is cable internet in Sullivans Island?
The map below shows maximum cable internet speeds by area in Sullivans Island.
Cable Internet Speed Key
The average Sullivans Island home can get up to 1,766 Mbps on their cable internet plan. The fastest cable download speed in the city is 2,000 Mbps, which 70.69% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 29.31% of homes can only purchase plans up to 1,200 Mbps. See the internet provider details below for info about their speed and coverage in Sullivans Island.
Cable internet speeds tend to be faster in the west parts of Sullivans Island, and slower in the northwest areas of the city.
Is cable the fastest internet I can get in Sullivans Island?
The fastest internet for you may vary based on where in Sullivans Island you live. In general, fiber competes most often with cable in the city.
- Fiber is the fastest internet type for 100.00% of Sullivans Island homes.
- Cable is fastest for less than 1% 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 Sullivans Island homes.
Cable Providers in Depth
Below you'll find which TV and internet providers offer service in Sullivans Island, along with details on where in Sullivans Island and at what speeds.
XFINITY from Comcast Cable in Sullivans Island, SC
XFINITY cable coverage
About 100.00%, or 2,665 people, have XFINITY cable internet available to them in the city. The company covers the entire Sullivans Island area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in every corner of Sullivans Island.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in Sullivans Island. Versus other cable providers in the area, XFINITY cable is the fastest. There are 2 different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,200 Mbps, and the city-wide average maximum speed for Sullivans Island customers is up to 1,766 Mbps.
Show all download speeds
- 70.7% up to 2,000.0 Mbps
- 29.3% up to 1,200.0 Mbps
XFINITY from Comcast cable upload speeds
In Sullivans Island download speeds tend to be faster than than upload speeds for XFINITY cable. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and the fastest compared to other Sullivans Island cable providers. XFINITY offers 2 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 Sullivans Island is up to 250 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 187 Mbps.
Show all upload speeds
- 70.7% up to 250.0 Mbps
- 29.3% up to 35.0 Mbps
WOW! Cable in Sullivans Island, SC
WOW! cable coverage
About 28.78%, or 767 people, have WOW! cable internet available to them in the city. The company covers the north and northwest Sullivans Island area. WOW! is a large internet service provider internet service providers in the US, with internet service available in a small portion of Sullivans Island.
WOW! cable download speeds
WOW! is below average when comparing download speeds to all other internet providers in Sullivans Island. Versus other cable providers in the area, WOW! cable is the slowest. There are no different maximum speeds throughout Sullivans Island. The fastest plan anyone in Sullivans Island can order from WOW! goes up to 1,200 Mbps, and all Sullivans Island customers can get this speed.
Show all download speeds
- 100.0% up to 1,200.0 Mbps
WOW! cable upload speeds
In Sullivans Island download speeds tend to be faster than than upload speeds for WOW! cable. Compared to other ISPs, WOW! is below average where upload speeds are concerned, and the slowest compared to other Sullivans Island cable providers. WOW! offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sullivans Island is up to 50 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 50.0 Mbps
Sullivans Island Cable by Area
This information is most helpful to those looking for homes or considering moving to Sullivans Island or any of the areas nearby.
How does cable internet in Sullivans Island compare to the rest of South Carolina?
Cable internet speeds in Sullivans Island are much faster versus the average speeds in South Carolina: 0.00 Mbps in South Carolina versus 1,766 Mbps in the city. The state has similar cable availability compared to the city. Average cable coverage in South Carolina is 0.00% versus 100.00% in Sullivans Island.
What zip codes have cable internet?
Cable internet coverage varies by zip code and neighborhood. Some examples in or around Sullivans Island 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
- Isle Of Palms, SC: less cable coverage, slower speeds
- Mount Pleasant, SC: less cable coverage, slower speeds
- Charleston, SC: less cable coverage, slower speeds
- Folly Beach, SC: less cable coverage, slower speeds
- Johns Island, SC: less cable coverage, slower speeds
- Charleston Afb, SC: less cable coverage, slower speeds
- Fenwick Hills, SC: equal cable coverage, slower speeds
- Legareville, SC: equal cable coverage, slower speeds
- Red Top, SC: less cable coverage, slower speeds
- Kiawah Island, SC: less cable coverage, slower speeds
Cities with Similar Populations
- Baird, TX: less cable coverage, slower speeds
- Lesage, WV: less cable coverage, slower speeds
- Star Valley, AZ: less cable coverage, slower speeds
- Frederic, WI: less cable coverage, slower speeds
- Empire, CA: less cable coverage, slower speeds
- East Uniontown, PA: equal cable coverage, slower speeds
- Duquesne, MO: equal cable coverage, slower speeds
- Creola, AL: less cable coverage, slower speeds
- Carlisle, AR: less cable coverage, slower speeds
- Belle Plaine, IA: less cable coverage, slower speeds