Round Lake, New York Zip Codes
📍 Round Lake is in Saratoga County, New York with 1 zip code; the most populous is 12151.
Round Lake is a USPS city name in Saratoga County, New York with a Census population of approximately 986 across its ZIP codes. Saratoga County as a whole has 21 ZIP codes in this directory. Below you'll find every zip code serving Round Lake with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All Round Lake Zip Codes
Round Lake at a Glance
Round Lake has 1 ZIP code in this directory: 1 standard delivery ZIP. Its one ZIP with published Census housing data, 12151, has 986 residents.
Round Lake's ZIP has a household income of $96,184 and a home value of $313,100, a price-to-income ratio of 3.3, above the 2.9 New York ZIP median. Median rent across these ZIPs is $1,655 a month.
87% of households in Round Lake own their home (statewide ZIP median 80%). 55% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 2.5%, far below the 9.9% statewide ZIP median. Overall density is about 379 residents per square mile across 3 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 New York ZIP Code Affordability Report.
Round Lake Zip Code Map
Interactive map of Round Lake, New York zip codes. Click any marker for details.