| ZIP Codes: | 12 ZIP Codes (8 Standard, 4 PO Box, 0 Unique) [See All] |
| Area Codes: | 607 / 680 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:14 PM |
| Population: | 46,761 [See All] |
| FIPS: | 36023 |
| CBSA: | Cortland, NY |
| Land Area: | 498 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 42.6104, -76.0932 |
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46,761 residents live across 12 ZIPs covering 498 sq mi, served by 12 distinct USPS-recognized cities.
Population moved from 49,359 to 46,741 from 2014 to 2024 — a -5.3% change. 4 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 13158 (Truxton, $85,208 median) and poorest ZIP 13101 (Mc Graw, $63,587) are 10.7 miles apart — a 1.3× income gap across local geography.
Median home values vary 1.6× across this county — from $111,800 in 13863 (Willet) to $175,000 in 13141 (Preble).
Density varies 18× across the county — from 22 people/sq mi in 13158 (Truxton) to 406 in 13784 (Harford).
Educational attainment ranges from 3.5% bachelor's+ in 13784 (Harford) to 36.3% in 13077 (Homer) — the breadth of educational profiles across the area.
Within New York, this is the #51 most populous of 62 counties and ranks #37 for median household income .
Weighted by population, the typical household earns about $70,083 across the county — reflecting what a typical resident sees, not a simple ZIP average.
28.6% of adults age 25+ hold a bachelor's degree or higher (8,490 of 29,715 reporting).
8 Standard delivery, 4 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
Cortland County lost 5.3% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 13045 | Cortland | Standard | 28,361 | $69,961 | 113.2 | -5.5% |
| 13077 | Homer | Standard | 6,405 | $72,266 | 73.3 | -4.0% |
| 13803 | Marathon | Standard | 4,273 | $63,713 | 88.7 | 2.9% |
| 13040 | Cincinnatus | Standard | 2,595 | $70,167 | 99.2 | 4.6% |
| 13101 | Mc Graw | Standard | 2,358 | $63,587 | 38.8 | -11.0% |
| 13158 | Truxton | Standard | 1,217 | $85,208 | 54.2 | -27.4% |
| 13141 | Preble | Standard | 652 | $80,208 | 15.4 | 5.8% |
| 13784 | Harford | PO Box | 382 | $76,446 | 0.9 | 189.4% |
| 13863 | Willet | Standard | 382 | $73,333 | 13.3 | -51.8% |
| 13087 | Little York | PO Box | 116 | $97,125 | 0.8 | -34.5% |
| 13738 | Blodgett Mills | PO Box | 20 | — | 0.2 | — |
| 13056 | East Homer | PO Box | — | — | 0.0 | — |