Cortland County, New York Zip Codes
📍 Cortland County has 12 zip codes with a population of 46,902.
Cortland County is located in New York with a land area of 496 square miles. The county seat is Cortland. Below you'll find all 12 zip codes in Cortland County with population, income and home value, the county's affordability profile, and links to its 12 city pages.
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 Cortland County Zip Codes
| ZIP Code | City | Details |
|---|---|---|
| 13040 | Cincinnatus | View → |
| 13045 | Cortland | View → |
| 13056 | East Homer | View → |
| 13077 | Homer | View → |
| 13087 | Little York | View → |
| 13101 | Mc Graw | View → |
| 13141 | Preble | View → |
| 13158 | Truxton | View → |
| 13738 | Blodgett Mills | View → |
| 13784 | Harford | View → |
| 13803 | Marathon | View → |
| 13863 | Willet | View → |
Cortland County at a Glance
Cortland County has 12 ZIP codes in this directory: 12 standard delivery ZIPs. The 9 ZIPs with published Census housing data cover 46,902 residents, the largest being 13045 (Cortland) with 28,388 people.
The median ZIP in Cortland County has a household income of $70,111 and a home value of $159,900, a price-to-income ratio of 2.0, below the 2.9 New York ZIP median. Affordability ranges from 13863 in Willet at a ratio of 1.5 to 13087 in Little York, where the median home is $193,400. The highest median income is in 13087 (Little York) at $130,455. Median rent across these ZIPs is $840 a month.
80% of households in the typical Cortland County ZIP own their home (statewide ZIP median 80%). 27% of adults hold a bachelor's degree, below the 31% statewide median. The median poverty rate is 9.5%, in line with the 9.9% statewide ZIP median. Overall density is about 95 residents per square mile across 496 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.
Cortland County Zip Code Map
Interactive map of Cortland County, New York zip codes.