In Charleston County there are 5 residential Fiber providers covering 60.64% of the county. The average home can get speeds up to 4,270 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 Charleston County, SC.
To see availability maps for all providers including fiber, cable, DSL, and more in Charleston County, SC please click below.
Charleston County, SC Availability Maps
Fiber Internet Service Providers in Charleston County
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 Charleston County are not shown.
Charleston County 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 Charleston County is fiber internet available?
Fiber Internet Availability Key
Fiber is available in 60.64% of Charleston County. Areas in green have fiber internet service, where areas in yellow or red may not. The most widely available provider is AT&T. Call one of the companies with service in Charleston County above to see who has service at your home.
How fast is fiber internet in Charleston County?
The map below shows maximum fiber internet speeds by area in Charleston County.
Fiber Internet Speed Key
The average Charleston County home can get up to 4,270 Mbps on their fiber internet plan. The fastest fiber download speed in the county is 8,000 Mbps, which less than 1% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 10.78% 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 Charleston County.
Fiber internet speeds tend to be faster in the central parts of Charleston County, and slower in the west areas of the county.
Is fiber the fastest internet I can get in Charleston County?
The fastest internet for you may vary based on where in Charleston County you live. In general, cable competes most often with fiber in the county.
- Fiber is the fastest internet type for 51.13% of Charleston County homes.
- Cable is fastest for 46.88% of the county.
- DSL is fastest for less than 1%.
- Fixed wireless is fastest for less than 1%.
- Satellite internet may be the only option for 1.73% of Charleston County homes.
Fiber Providers in Depth
Below you'll find which TV and internet providers offer service in Charleston County, along with details on where in Charleston County and at what speeds.
EarthLink Fiber in Charleston County, SC
EarthLink fiber coverage
About 55.02%, or 224,602 people, have EarthLink fiber internet available to them in the county. The company covers the entire Charleston County area. EarthLink is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Charleston County.
EarthLink fiber download speeds
EarthLink is above average when comparing download speeds to all other internet providers in Charleston County. Versus other fiber providers in the area, EarthLink fiber is above average. There are 2 different maximum speeds throughout Charleston County. The fastest plan anyone in Charleston County can order from EarthLink goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the county-wide average maximum speed for Charleston County customers is up to 4,368 Mbps.
Show all download speeds
- 84.2% up to 5,000.0 Mbps
- 15.8% up to 1,000.0 Mbps
EarthLink fiber upload speeds
In Charleston County download speeds tend to be equal to than upload speeds for EarthLink fiber. Compared to other ISPs, EarthLink is above average where upload speeds are concerned, and above average compared to other Charleston County fiber providers. EarthLink offers 2 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Charleston County is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, EarthLink customers can get speeds up to 4,368 Mbps.
Show all upload speeds
- 84.2% up to 5,000.0 Mbps
- 15.8% up to 1,000.0 Mbps
AT&T Fiber in Charleston County, SC
AT&T fiber coverage
About 55.02%, or 224,602 people, have AT&T fiber internet available to them in the county. The company covers the entire Charleston County area. AT&T is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Charleston County.
AT&T fiber download speeds
AT&T is above average when comparing download speeds to all other internet providers in Charleston County. Versus other fiber providers in the area, AT&T fiber is above average. There are 2 different maximum speeds throughout Charleston County. The fastest plan anyone in Charleston County can order from AT&T goes up to 5,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the county-wide average maximum speed for Charleston County customers is up to 4,368 Mbps.
Show all download speeds
- 84.2% up to 5,000.0 Mbps
- 15.8% up to 1,000.0 Mbps
AT&T fiber upload speeds
In Charleston County download speeds tend to be equal to than upload speeds for AT&T fiber. Compared to other ISPs, AT&T is above average where upload speeds are concerned, and above average compared to other Charleston County fiber providers. AT&T offers 2 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Charleston County is up to 5,000 Mbps. Some customers have slower plan choices, which only go up to 1,000 Mbps. On average, AT&T customers can get speeds up to 4,368 Mbps.
Show all upload speeds
- 84.2% up to 5,000.0 Mbps
- 15.8% up to 1,000.0 Mbps
Home Telecom Fiber in Charleston County, SC
Home Telecom fiber coverage
About 5.73%, or 23,395 people, have Home Telecom fiber internet available to them in the county. The company covers the entire Charleston County area. Home Telecom is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Charleston County.
Home Telecom fiber download speeds
Home Telecom is above average when comparing download speeds to all other internet providers in Charleston County. Versus other fiber providers in the area, Home Telecom fiber is above average. There are no different maximum speeds throughout Charleston County. The fastest plan anyone in Charleston County can order from Home Telecom goes up to 5,000 Mbps, and all Charleston County customers can get this speed.
Show all download speeds
- 100.0% up to 5,000.0 Mbps
Home Telecom fiber upload speeds
In Charleston County download speeds tend to be equal to than upload speeds for Home Telecom fiber. Compared to other ISPs, Home Telecom is above average where upload speeds are concerned, and above average compared to other Charleston County fiber providers. Home Telecom offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Charleston County is up to 5,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 5,000.0 Mbps
XFINITY from Comcast Fiber in Charleston County, SC
XFINITY fiber coverage
About 1.89%, or 7,710 people, have XFINITY fiber internet available to them in the county. The company covers the northwest, southwest, east, west, south, and northeast Charleston County area. XFINITY is one of the largest internet service providers internet service providers in the US, with internet service available in a very small piece of Charleston County.
XFINITY from Comcast fiber download speeds
XFINITY is below average when comparing download speeds to all other internet providers in Charleston County. Versus other fiber providers in the area, XFINITY fiber is below average. There are 3 different maximum speeds throughout Charleston County. The fastest plan anyone in Charleston County can order from XFINITY goes up to 2,000 Mbps, the slowest package only goes up to 1,000 Mbps, and the county-wide average maximum speed for Charleston County customers is up to 1,301 Mbps.
Show all download speeds
- 18.3% up to 2,000.0 Mbps
- 58.8% up to 1,200.0 Mbps
- 22.9% up to 1,000.0 Mbps
XFINITY from Comcast fiber upload speeds
In Charleston County download speeds tend to be faster than than upload speeds for XFINITY fiber. Compared to other ISPs, XFINITY is below average where upload speeds are concerned, and below average compared to other Charleston County fiber providers. XFINITY offers 3 different upload speeds across the county, so your internet plan's upload speed may vary by neighborhood . The fastest upload speed available to anyone from this ISP in Charleston County is up to 1,000 Mbps. Some customers have slower plan choices, which only go up to 35 Mbps. On average, XFINITY customers can get speeds up to 312 Mbps.
Show all upload speeds
- 25.0% up to 1,000.0 Mbps
- 16.7% up to 250.0 Mbps
- 58.3% up to 35.0 Mbps
Palmetto Rural Telephone Cooperative Fiber in Charleston County, SC
PRTC fiber coverage
About 1.85%, or 7,542 people, have PRTC fiber internet available to them in the county. The company covers the southwest, west, and northwest Charleston County area. PRTC is a large internet service provider internet service providers in the US, with internet service available in a very small piece of Charleston County.
Palmetto Rural Telephone Cooperative fiber download speeds
PRTC is below average when comparing download speeds to all other internet providers in Charleston County. Versus other fiber providers in the area, PRTC fiber is one of the slowest. There are no different maximum speeds throughout Charleston County. The fastest plan anyone in Charleston County can order from PRTC goes up to 1,000 Mbps, and all Charleston County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Palmetto Rural Telephone Cooperative fiber upload speeds
In Charleston County download speeds tend to be equal to than upload speeds for PRTC fiber. Compared to other ISPs, PRTC is below average where upload speeds are concerned, and below average compared to other Charleston County fiber providers. PRTC offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in Charleston County is up to 1,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 1,000.0 Mbps
Charleston County Fiber by Area
This information is most helpful to those looking for homes or considering moving to Charleston County or any of the areas nearby.
How does fiber internet in Charleston County compare to the rest of South Carolina?
Fiber internet speeds in Charleston County are much faster versus the average speeds in South Carolina: 0.00 Mbps in South Carolina versus 4,270 Mbps in the county. The state has similar fiber availability compared to the county. Average fiber coverage in South Carolina is 0.00% versus 60.64% in Charleston County.
What zip codes have fiber internet?
Fiber internet coverage varies by zip code and neighborhood. Some examples in or around Charleston County 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 counties?
Below are counties nearby and with similar populations. This comparison can be useful if living somewhere with fast internet is important to you.
Nearby Counties
- Dorchester County, SC: more fiber coverage, slower speeds
- Colleton County, SC: more fiber coverage, slower speeds
- Hampton County, SC: more fiber coverage, slower speeds
- Allendale County, SC: more fiber coverage, slower speeds
- Screven County, GA: more fiber coverage, faster speeds
- Jenkins County, GA: more fiber coverage, slower speeds
- Washington County, GA: more fiber coverage, slower speeds
- Wilkinson County, GA: more fiber coverage, slower speeds
- Twiggs County, GA: more fiber coverage, slower speeds
- Jones County, GA: more fiber coverage, slower speeds
Counties with Similar Populations
- Placer County, CA: less fiber coverage, slower speeds
- Davis County, UT: more fiber coverage, faster speeds
- Santa Barbara County, CA: more fiber coverage, faster speeds
- San Juan Municipio, PR: more fiber coverage, slower speeds
- Rutherford County, TN: more fiber coverage, faster speeds
- Rockland County, NY: more fiber coverage, faster speeds
- Hillsborough County, NH: more fiber coverage, slower speeds
- Richland County, SC: more fiber coverage, faster speeds
- Pulaski County, AR: more fiber coverage, faster speeds
- Albany County, NY: less fiber coverage, slower speeds