Lake Ronkonkoma
Census-designated place in Suffolk County, New York

Lake Ronkonkoma is an unincorporated community (census-designated place) in Suffolk County, New York, with 18,619 residents (2020 Census). It sits at 72 ft (22 m) above sea level. The nearest town is Lake Grove, 1.9 miles N.
- 18,619residents (2020 Census)
- 72 ftelevation · 22 m
- 4.5 sq miland area · 11.7 km²
- 4,104 / sq mipopulation density
- 11779main ZIP code (3 in total)
About Lake Ronkonkoma
Lake Ronkonkoma is a hamlet and census-designated place (CDP) in Suffolk County, on Long Island, in New York, United States. The population was 18,619 at the time of the 2020 census.
Located on the north and east sides of the eponymous lake, Lake Ronkonkoma is mainly located within the Town of Brookhaven, with the northwestern section being located within the Town of Smithtown.
Text: Wikipedia · CC BY-SA 4.0
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Living in Lake Ronkonkoma
- Median household income
- $101,633
- Median home value
- $525,000
- Median rent
- $2,170/mo
- Median age
- 42.6
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Map of Lake Ronkonkoma
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Open in Google Maps ›Lake Ronkonkoma, NY population
Lake Ronkonkoma had 18,619 residents in the 2020 Census.
| 2020 Census | 18,619 |
|---|---|
| Density | 4,104 per sq mi (1,585 per km²) |
Source: U.S. Census Bureau, Decennial Census.
Lake Ronkonkoma at a glance
| State | New York (NY) |
|---|---|
| County | Suffolk County |
| Type | Census-designated place |
| Population | 18,619 (2020) |
| Land area | 4.54 sq mi (11.7 km²) |
| Water area | 0.00 sq mi (0.01 km²) |
| Elevation | 72 ft (22 m) |
| Coordinates | 40.8303° N, 73.1133° W |
| ZIP codes | 11779, 11755, 11767 |
| Census code (GEOID) | 3640838 |
Sources: U.S. Census Bureau (Gazetteer, ZCTA), USGS GNIS, Wikidata.
Towns near Lake Ronkonkoma
- Lake Grove1.9 mi N
- Ronkonkoma1.9 mi S
- Nesconset2.3 mi NW
- Centereach3.1 mi NE
- Holbrook3.4 mi SE
- Islandia3.4 mi SW
- St. James3.8 mi NW
- Holtsville3.8 mi E
- Bohemia3.8 mi S
- Farmingville3.9 mi E
- Village of the Branch4.0 mi NW
- Selden4.5 mi NE
Straight-line distance between town centers.
Frequently asked questions about Lake Ronkonkoma
What county is Lake Ronkonkoma in?
Lake Ronkonkoma is in Suffolk County, New York.
What is the population of Lake Ronkonkoma, NY?
18,619 people lived in Lake Ronkonkoma at the 2020 Census.
What is the ZIP code of Lake Ronkonkoma, NY?
The main ZIP code is 11779. Other ZIP codes: 11755, 11767.
What is the elevation of Lake Ronkonkoma?
72 feet (22 m) above sea level.
What towns are near Lake Ronkonkoma?
Lake Grove (1.9 mi), Ronkonkoma (1.9 mi), Nesconset (2.3 mi), Centereach (3.1 mi), Holbrook (3.4 mi).
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