| ZIP Codes: | 34 ZIP Codes (29 Standard, 5 PO Box, 0 Unique) [See All] |
| Area Codes: | 329 / 518 / 607 / 838 / 845 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:14 PM |
| Population: | 40,387 [See All] |
| FIPS: | 36025 |
| Land Area: | 1,323 sq mi |
| Water Area: | 20 sq mi |
| Coordinates: | 42.2598, -74.8907 |
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40,387 residents live across 34 ZIPs covering 1,323 sq mi, served by 34 distinct USPS-recognized cities.
Population moved from 42,606 to 40,387 from 2014 to 2024 — a -5.2% change. 14 ZIPs gained residents, 20 lost.
The county's wealthiest ZIP 13860 (West Davenport, $143,315 median) and poorest ZIP 13846 (Treadwell, $32,857) are 9.9 miles apart — a 4.4× income gap across local geography.
Median home values vary 3.1× across this county — from $121,300 in 13839 (Sidney Center) to $372,200 in 12421 (Denver).
Density varies 36× across the county — from 11 people/sq mi in 13731 (Andes) to 400 in 13838 (Sidney).
Educational attainment ranges from 12.6% bachelor's+ in 13774 (Fishs Eddy) to 49.5% in 13740 (Bovina Center) — the breadth of educational profiles across the area.
Within New York, this is the #53 most populous of 62 counties and ranks #50 for median household income .
Weighted by population, the typical household earns about $63,828 across the county — reflecting what a typical resident sees, not a simple ZIP average.
28.1% of adults age 25+ hold a bachelor's degree or higher (8,442 of 30,090 reporting).
29 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.
Median household income spans 4.4× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
Delaware County lost 5.2% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 13856 | Walton | Standard | 5,881 | $48,958 | 179.7 | -10.5% |
| 13753 | Delhi | Standard | 5,696 | $70,000 | 97.0 | -0.2% |
| 13838 | Sidney | Standard | 4,251 | $53,306 | 10.6 | -4.5% |
| 12167 | Stamford | Standard | 2,279 | $53,047 | 53.3 | -11.0% |
| 13783 | Hancock | Standard | 2,035 | $51,510 | 122.0 | -7.5% |
| 13775 | Franklin | Standard | 1,752 | $78,750 | 54.1 | -4.8% |
| 12455 | Margaretville | Standard | 1,689 | $85,926 | 63.1 | -14.6% |
| 13839 | Sidney Center | Standard | 1,360 | $54,271 | 49.1 | 12.0% |
| 12430 | Fleischmanns | Standard | 1,253 | $68,250 | 40.1 | 21.2% |
| 13757 | East Meredith | Standard | 1,130 | $73,523 | 35.3 | 2.9% |
| 13731 | Andes | Standard | 1,038 | $73,750 | 94.2 | -2.6% |
| 13788 | Hobart | Standard | 997 | $100,313 | 35.4 | -4.3% |
| 12434 | Grand Gorge | Standard | 944 | $48,656 | 9.6 | 83.3% |
| 13782 | Hamden | Standard | 936 | $62,961 | 37.7 | 53.2% |
| 13750 | Davenport | Standard | 896 | $62,344 | 29.0 | 4.4% |
| 13752 | Delancey | Standard | 858 | $66,302 | 57.6 | 17.7% |
| 12474 | Roxbury | Standard | 857 | $57,428 | 41.4 | -41.6% |
| 13739 | Bloomville | Standard | 833 | $64,219 | 39.0 | -8.6% |
| 13756 | East Branch | Standard | 697 | $71,765 | 43.5 | 40.0% |
| 13755 | Downsville | Standard | 652 | $64,375 | 50.5 | -49.3% |
| 12406 | Arkville | Standard | 644 | $71,208 | 50.3 | -11.7% |
| 13740 | Bovina Center | Standard | 626 | $80,625 | 35.9 | 31.8% |
| 13842 | South Kortright | Standard | 582 | $88,500 | 13.3 | -17.1% |
| 13786 | Harpersfield | Standard | 430 | $54,688 | 7.1 | -35.2% |
| 13774 | Fishs Eddy | PO Box | 323 | $70,638 | 6.2 | 1.9% |
| 13846 | Treadwell | Standard | 308 | $32,857 | 8.5 | 13.7% |
| 13751 | Davenport Center | Standard | 297 | — | 3.4 | 90.4% |
| 12421 | Denver | Standard | 261 | $100,819 | 21.4 | -36.5% |
| 13860 | West Davenport | PO Box | 257 | $143,315 | 1.9 | 1411.8% |
| 13804 | Masonville | Standard | 244 | $45,000 | 12.2 | -62.9% |
| 12438 | Halcottsville | PO Box | 190 | $78,512 | 4.8 | 245.5% |
| 13806 | Meridale | Standard | 143 | — | 3.6 | -45.0% |
| 12459 | New Kingston | PO Box | 30 | — | 12.1 | -85.4% |
| 13847 | Trout Creek | PO Box | 18 | — | 0.0 | -62.5% |