In St. Mary's County there are 2 residential Cable providers covering 97.65% of the county. The average home can get speeds up to 1,088 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 St. Mary's County, MD.
To see availability maps for all providers including fiber, cable, DSL, and more in St. Mary's County, MD please click below.
St. Mary's County, MD Availability Maps
Cable Internet Service Providers in St. Mary's 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 St. Mary's County are not shown.
St. Mary's 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 St. Mary's County is cable internet available?
Cable Internet Availability Key
Cable is available in 97.65% of St. Mary's County. Areas in green have cable internet service, where areas in yellow or red may not. The most widely available provider is Atlantic Broadband. Call one of the companies with service in St. Mary's County above to see who has service at your home.
How fast is cable internet in St. Mary's County?
The map below shows maximum cable internet speeds by area in St. Mary's County.
Cable Internet Speed Key
The average St. Mary's County home can get up to 1,088 Mbps on their cable internet plan. The fastest cable download speed in the county is 2,000 Mbps, which 8.43% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, 88.46% 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 St. Mary's County.
Cable internet speeds tend to be faster in the northwest parts of St. Mary's County, and slower in the southeast areas of the county.
Is cable the fastest internet I can get in St. Mary's County?
The fastest internet for you may vary based on where in St. Mary's County you live. In general, fiber competes most often with cable in the county.
- Fiber is the fastest internet type for 60.84% of St. Mary's County homes.
- Cable is fastest for 36.87% 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 2.10% of St. Mary's County homes.
Cable Providers in Depth
Below you'll find which TV and internet providers offer service in St. Mary's County, along with details on where in St. Mary's County and at what speeds.
Atlantic Broadband Cable in St. Mary's County, MD
Atlantic Broadband cable coverage
About 94.15%, or 107,121 people, have Atlantic Broadband cable internet available to them in the county. The company covers the entire St. Mary's County area. Atlantic Broadband is a large internet service provider internet service providers in the US, with internet service available in most of St. Mary's County.
Atlantic Broadband cable download speeds
Atlantic Broadband is above average when comparing download speeds to all other internet providers in St. Mary's County. Versus other cable providers in the area, Atlantic Broadband cable is the slowest. There are no different maximum speeds throughout St. Mary's County. The fastest plan anyone in St. Mary's County can order from Atlantic Broadband goes up to 1,000 Mbps, and all St. Mary's County customers can get this speed.
Show all download speeds
- 100.0% up to 1,000.0 Mbps
Atlantic Broadband cable upload speeds
In St. Mary's County download speeds tend to be faster than than upload speeds for Atlantic Broadband cable. Compared to other ISPs, Atlantic Broadband is below average where upload speeds are concerned, and the slowest compared to other St. Mary's County cable providers. Atlantic Broadband offers no different upload speeds across the county. The fastest upload speed available to anyone from this ISP in St. Mary's County is up to 50 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 50.0 Mbps
XFINITY from Comcast Cable in St. Mary's County, MD
XFINITY cable coverage
About 11.00%, or 12,510 people, have XFINITY cable internet available to them in the county. The company covers the northwest, southeast, central, east, west, and north St. Mary's 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 St. Mary's County.
XFINITY from Comcast cable download speeds
XFINITY is above average when comparing download speeds to all other internet providers in St. Mary's County. Versus other cable providers in the area, XFINITY cable is the fastest. There are 3 different maximum speeds throughout St. Mary's County. The fastest plan anyone in St. Mary's 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 St. Mary's County customers is up to 1,780 Mbps.
Show all download speeds
- 76.7% up to 2,000.0 Mbps
- 7.0% up to 1,200.0 Mbps
- 16.4% up to 1,000.0 Mbps
XFINITY from Comcast cable upload speeds
In St. Mary's County 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 St. Mary's County cable providers. XFINITY 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 St. Mary's County 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 200 Mbps.
Show all upload speeds
- 76.7% up to 250.0 Mbps
- 23.3% up to 35.0 Mbps
St. Mary's County Cable by Area
This information is most helpful to those looking for homes or considering moving to St. Mary's County or any of the areas nearby.
How does cable internet in St. Mary's County compare to the rest of Maryland?
Cable internet speeds in St. Mary's County are much faster versus the average speeds in Maryland: 0.00 Mbps in Maryland versus 1,088 Mbps in the county. The state has similar cable availability compared to the county. Average cable coverage in Maryland is 0.00% versus 97.65% in St. Mary's County.
What zip codes have cable internet?
Cable internet coverage varies by zip code and neighborhood. Some examples in or around St. Mary's County 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 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
- King George County, VA: less cable coverage, slower speeds
- Stafford County, VA: less cable coverage, faster speeds
- Fredericksburg City, VA: less cable coverage, faster speeds
- Wicomico County, MD: less cable coverage, faster speeds
- Spotsylvania County, VA: less cable coverage, faster speeds
- Worcester County, MD: less cable coverage, faster speeds
- Orange County, VA: less cable coverage, faster speeds
- Culpeper County, VA: less cable coverage, faster speeds
- Madison County, VA: less cable coverage, faster speeds
- Greene County, VA: less cable coverage, faster speeds
Counties with Similar Populations
- Berkeley County, WV: less cable coverage, faster speeds
- Blair County, PA: less cable coverage, faster speeds
- Comanche County, OK: less cable coverage, slower speeds
- Carroll County, GA: less cable coverage, faster speeds
- Rockwall County, TX: less cable coverage, slower speeds
- Sheboygan County, WI: less cable coverage, slower speeds
- Potter County, TX: less cable coverage, slower speeds
- Oswego County, NY: less cable coverage, slower speeds
- Ontario County, NY: less cable coverage, slower speeds
- Newton County, GA: less cable coverage, faster speeds