Cornwallville, New York Zip Codes
📍 Cornwallville is in Greene County, New York with 1 zip code; the most populous is 12418.
Cornwallville is a USPS city name in Greene County, New York with a Census population of approximately 321 across its ZIP codes. Greene County as a whole has 36 ZIP codes in this directory. Below you'll find every zip code serving Cornwallville 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 Cornwallville Zip Codes
Cornwallville at a Glance
Cornwallville has 1 ZIP code in this directory: 1 standard delivery ZIP. Its one ZIP with published Census housing data, 12418, has 321 residents.
Cornwallville's ZIP has a household income of $97,750 and a home value of $261,600, a price-to-income ratio of 2.7, below the 2.9 New York ZIP median.
83% of households in Cornwallville own their home (statewide ZIP median 80%). 42% of adults hold a bachelor's degree, above the 31% statewide median. The median poverty rate is 8.7%, below the 9.9% statewide ZIP median. Overall density is about 23 residents per square mile across 14 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.
Cornwallville Zip Code Map
Interactive map of Cornwallville, New York zip codes. Click any marker for details.