In Sag Harbor there are 5 residential internet providers covering 99.97% of the city. The average home can get speeds up to 7,868 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.
Jump to Availability Maps
5 Internet Service Providers in Sag Harbor
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 Sag Harbor are not shown.
Sag Harbor 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
Availability maps for all providers in Sag Harbor
Using the dropdown below, please select a provider. Green indicates nearly all homes have service, red indicates few homes have service, and blank indicates no service.
Please note some providers will take longer to load than others
Internet service is available in 99.97% of Sag Harbor. Using our interactive availability map, you can compare service areas for different providers, we include fiber, cable, DSL, or fixed wireless internet service for all providers who offer it. You will notice that some providers might be listed multiple times for each service. If you find no providers cover the location you're looking at, you can opt for satellite service. The most widely available provider is Optimum. Now you can call companies in Sag Harbor with more confidence that they might be available.
How fast are internet speeds in Sag Harbor?
The map below shows maximum internet speeds by area in Sag Harbor.
Internet Speed Key
The average Sag Harbor home can get up to 7,868 Mbps on their internet plan. For most people, the fastest download speed in the city is 8,000 Mbps, which 98.12% of residents can get. Some homes and apartments do not have access to these speeds. On the slower end, for example, less than 1% of homes can only purchase plans up to 300 Mbps. See the internet provider details below for info about their speed and coverage in Sag Harbor.
Internet speeds tend to be faster in the southwest parts of Sag Harbor, and slower in the southeast areas of the city.
What type of internet should I choose in Sag Harbor?
The fastest internet for you may vary based on where in Sag Harbor you live. If speed is your main concern, fiber will be the fastest internet in the city.
- Fiber is the fastest internet type for 98.12% of Sag Harbor homes.
- Cable is fastest for 1.68% 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 Sag Harbor homes.
Internet Market Health in Sag Harbor
Internet Competition Key
The map shows how competitive the Sag Harbor internet service market is. Areas in green have more alternatives, areas in yellow have a few choices, and areas in red may have only one provider. More competition usually means faster speeds and better prices for you, the customer.
Below are quick facts on internet competition and market health in Sag Harbor based on what connections the average home has availabile:
- Average number of internet service providers to a home: 3.2 (unhealthy)
- Average types of service (fiber, cable, DSL, etc): 2.8 (healthy)
- Average providers with broadband (25 Mbps+) speeds: 3.2 (unhealthy)
Overall, competition is unhealthy.
Sag Harbor internet customers have the ability to buy internet service from 1 to 4 different providers, depending on where they live. For different types of service, Sag Harbor homes have between 1 and 3 options. The type(s) of service available are cable, fiber, and fixed wireless, though these may vary depending on the region within the city.
When it comes to broadband download speeds faster than 25 Mbps, the situation is similar. Sag Harbor internet customers who want faster speeds have between 1 and 4 choices of companies offering speeds up to or over 25 Mbps.
More internet companies with faster speeds means fewer monopolies and better prices for customers. In promoting a free market for internet, Sag Harbor needs improvement.
TV & Internet Providers in Depth
Below you'll find which TV and internet providers offer service in Sag Harbor, along with details on where in Sag Harbor and at what speeds.
Optimum Cable in Sag Harbor, NY
Optimum cable coverage
About 99.80%, or 2,967 people, have Optimum cable internet available to them in the city. The company covers the entire Sag Harbor area. Optimum is one of the largest internet service providers internet service providers in the US, with internet service available in most of Sag Harbor.
Optimum cable download speeds
Optimum is below average when comparing download speeds to all other internet providers in Sag Harbor. Versus other cable providers in the area, Optimum cable is the fastest. There are no different maximum speeds throughout Sag Harbor. The fastest plan anyone in Sag Harbor can order from Optimum goes up to 940 Mbps, and all Sag Harbor customers can get this speed.
Show all download speeds
- 100.0% up to 940.0 Mbps
Optimum cable upload speeds
In Sag Harbor download speeds tend to be faster than than upload speeds for Optimum cable. Compared to other ISPs, Optimum is below average where upload speeds are concerned, and the fastest compared to other Sag Harbor cable providers. Optimum offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sag Harbor is up to 35 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 35.0 Mbps
Optimum Fiber in Sag Harbor, NY
Optimum fiber coverage
About 98.12%, or 2,917 people, have Optimum fiber internet available to them in the city. The company covers the entire Sag Harbor area. Optimum is one of the largest internet service providers internet service providers in the US, with internet service available in most of Sag Harbor.
Optimum fiber download speeds
Optimum is the fastest when comparing download speeds to all other internet providers in Sag Harbor. Versus other fiber providers in the area, Optimum fiber is the fastest. There are no different maximum speeds throughout Sag Harbor. The fastest plan anyone in Sag Harbor can order from Optimum goes up to 8,000 Mbps, and all Sag Harbor customers can get this speed.
Show all download speeds
- 100.0% up to 8,000.0 Mbps
Optimum fiber upload speeds
In Sag Harbor download speeds tend to be equal to than upload speeds for Optimum fiber. Compared to other ISPs, Optimum is the fastest where upload speeds are concerned, and the fastest compared to other Sag Harbor fiber providers. Optimum offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sag Harbor is up to 8,000 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 8,000.0 Mbps
T-Mobile Home Internet Fixed Wireless in Sag Harbor, NY
T-Mobile Home Internet fixed wireless coverage
About 71.31%, or 2,120 people, have T-Mobile Home Internet fixed wireless internet available to them in the city. The company covers the entire Sag Harbor area. T-Mobile Home Internet is one of the largest internet service providers internet service providers in the US, with internet service available in much of Sag Harbor.
T-Mobile Home Internet fixed wireless download speeds
T-Mobile Home Internet is the slowest when comparing download speeds to all other internet providers in Sag Harbor. Versus other fixed wireless providers in the area, T-Mobile Home Internet fixed wireless is the slowest. There are 2 different maximum speeds throughout Sag Harbor. The fastest plan anyone in Sag Harbor can order from T-Mobile Home Internet goes up to 100 Mbps, the slowest package only goes up to 25 Mbps, and the city-wide average maximum speed for Sag Harbor customers is up to 50 Mbps.
Show all download speeds
- 33.6% up to 100.0 Mbps
- 66.4% up to 25.0 Mbps
T-Mobile Home Internet fixed wireless upload speeds
In Sag Harbor download speeds tend to be faster than than upload speeds for T-Mobile Home Internet fixed wireless. Compared to other ISPs, T-Mobile Home Internet is the slowest where upload speeds are concerned, and the slowest compared to other Sag Harbor fixed wireless providers. T-Mobile Home Internet 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 Sag Harbor is up to 20 Mbps. Some customers have slower plan choices, which only go up to 3.0 Mbps. On average, T-Mobile Home Internet customers can get speeds up to 8.7 Mbps.
Show all upload speeds
- 33.6% up to 20.0 Mbps
- 66.4% up to 3.0 Mbps
Verizon Fixed Wireless in Sag Harbor, NY
Verizon fixed wireless coverage
About 54.42%, or 1,618 people, have Verizon fixed wireless internet available to them in the city. The company covers the entire Sag Harbor area. Verizon is one of the largest internet service providers internet service providers in the US, with internet service available in a majority of Sag Harbor.
Verizon fixed wireless download speeds
Verizon is below average when comparing download speeds to all other internet providers in Sag Harbor. Versus other fixed wireless providers in the area, Verizon fixed wireless is the fastest. There are no different maximum speeds throughout Sag Harbor. The fastest plan anyone in Sag Harbor can order from Verizon goes up to 300 Mbps, and all Sag Harbor customers can get this speed.
Show all download speeds
- 100.0% up to 300.0 Mbps
Verizon fixed wireless upload speeds
In Sag Harbor download speeds tend to be faster than than upload speeds for Verizon fixed wireless. Compared to other ISPs, Verizon is below average where upload speeds are concerned, and the fastest compared to other Sag Harbor fixed wireless providers. Verizon offers no different upload speeds across the city. The fastest upload speed available to anyone from this ISP in Sag Harbor is up to 20 Mbps, which is available to everyone covered.
Show all upload speeds
- 100.0% up to 20.0 Mbps
Sag Harbor Internet by Area
This information is most helpful to those looking for homes or considering moving to Sag Harbor or any of the areas nearby.
How does internet in Sag Harbor compare to the rest of New York?
Internet speeds in Sag Harbor are much faster versus the average speeds in New York: 4,072 Mbps in New York versus 7,868 Mbps in the city. The state has similar internet availability compared to the city. Average internet coverage in New York is 98.64% versus 99.97% in Sag Harbor.
What zip codes have widespread internet?
Internet coverage varies by zip code and neighborhood. Some examples in or around Sag Harbor are shown below. You can enter any zip code here to see TV and internet providers by zip code.
What does internet service 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
- Noyack, NY: less internet coverage, faster speeds
- North Haven, NY: more internet coverage, faster speeds
- Wainscott, NY: more internet coverage, slower speeds
- Bridgehampton, NY: more internet coverage, faster speeds
- Sagaponack, NY: more internet coverage, slower speeds
- Northwest Harbor, NY: less internet coverage, slower speeds
- Watermill, NY: less internet coverage, slower speeds
- Shelter Island, NY: less internet coverage, slower speeds
- East Hampton North, NY: more internet coverage, slower speeds
- East Hampton, NY: less internet coverage, slower speeds
Cities with Similar Populations
- Beale Afb, CA: less internet coverage, slower speeds
- Friendship, WI: more internet coverage, slower speeds
- Union, WA: less internet coverage, slower speeds
- Kechi, KS: less internet coverage, slower speeds
- Kahuku, HI: less internet coverage, slower speeds
- Seneca, KS: less internet coverage, slower speeds
- La Luz, NM: less internet coverage, slower speeds
- Lavalette, WV: less internet coverage, slower speeds
- Hazen, ND: less internet coverage, slower speeds
- Wells, MN: less internet coverage, slower speeds