Zip Code 03285 — Thornton, NH
03285 is a ZIP Code associated with Thornton, NH, located within Grafton. 03285 ranks #10 out of 36 ZIP codes in Grafton County by population (and #121 out of 247 in NH). The area supports an estimated population of 2,799 residents across Data Pending housing units, with a population density of 21.6 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (43.924080, -71.643590)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 03285 |
| Primary City | Thornton |
| State / Province | NH |
| County | Grafton |
| Total Population | 2,799 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 21.6 people/sq mi |
| Timezone | America/New_York |
How 03285 Compares
| Metric | ZIP 03285 | Grafton County | NH State Average |
|---|
| Population | 2,799 | 92,200 (Total) | 1,394,951 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 21.6 /sq mi | -- | -- |
| County Pop Rank | #10 of 36 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →