County ZIP codes · New York · FIPS 36023
Cortland County, NY ZIP Codes
Cortland County, New York has 18 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 17 residential and 1 for PO boxes or a single organization. 11 of the residential ones lie mainly in Cortland County and 6 mainly in a neighboring county; 13 cross the county line. Median household income ranges from $63,487 in 13862 (Whitney Point) to $101,250 in 13159 (Tully) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Cortland County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $63,713 and $76,750.
They carry 17 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 17 residential ZIP codes in Cortland County
11 ZIP codes lie mainly in Cortland County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 13045 | Cortland | 28,361 | 263 | $70k | $168k | 85% |
| 13077 | Homer | 6,405 | 93 | $72k | $171k | 84% |
| 13803 | Marathon | 4,273 | 46 | $64k | $141k | 90% |
| 13040 | Cincinnatus | 2,595 | 26 | $70k | $139k | 84% |
| 13101 | McGraw | 2,358 | 61 | $64k | $144k | 100% |
| 13158 | Truxton | 1,217 | 21 | $85k | $174k | 94% |
| 13141 | Preble | 652 | 45 | $80k | $175k | 65% |
| 13784 | Harford | 382 | 371 | $76k | – | 100% |
| 13863 | Willet | 382 | 31 | $73k | $112k | 99% |
| 13087 | Little York | 116 | 122 | $97k | $206k | 100% |
| 13738 | Blodgett Mills | 20 | 107 | – | – | 100% |
Partly in Cortland County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 13053 | Dryden | 4,794 | 138 | $83k | $244k | 42% |
| 13159 | Tully | 5,204 | 67 | $101k | $229k | 32% |
| 13052 | De Ruyter | 1,759 | 30 | $77k | $134k | 26% |
| 13841 | Smithville Flats | 385 | 42 | $58k | $171k | 16% |
| 13835 | Richford | 1,184 | 27 | $67k | $103k | 15% |
| 13862 | Whitney Point | 3,440 | 67 | $64k | $140k | 1% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
13 ZIP codes of Cortland County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Cortland | Elsewhere |
|---|---|---|
| 13045 | 85% | Cayuga County 9%; Tompkins County 6% |
| 13077 | 84% | Onondaga County 14%; Cayuga County 2% |
| 13159 | 32% | Onondaga County 68% |
| 13053 | 42% | Tompkins County 58% |
| 13803 | 90% | Broome County 10% |
| 13862 | 1% | Broome County 99% |
| 13040 | 84% | Chenango County 16% |
| 13052 | 26% | Madison County 37%; Chenango County 33%; Onondaga County 4% |
| 13158 | 94% | Onondaga County 6% |
| 13835 | 15% | Tioga County 59%; Broome County 26% |
| 13141 | 65% | Onondaga County 35% |
| 13841 | 16% | Chenango County 80%; Broome County 4% |
| 13863 | 99% | Broome County 1% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 13056 | East Homer |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Cortland County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Cortland County's ZIP codes use 4 prefixes: 130, 131, 137 and 138.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 130 | Syracuse, NY (SCF 130) | 7 | 56 |
| 131 | Syracuse, NY (SCF 130) | 4 | 54 |
| 137 | Syracuse, NY (SCF 130) | 2 | 47 |
| 138 | Syracuse, NY (SCF 130) | 5 | 45 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.