County · New Jersey · United States
Mercer County ZIP codes
22 ZIP codes · 9 cities · FIPS 34021
Key facts
- State
- New Jersey (NJ)
- FIPS code
- 34021
- Population
- 383,286
- Median household income
- $96,333
- Median age
- 39.2
- Land area
- 224.4 sq mi (581.3 km²)
- Population density
- 1,708 / sq mi
- Area codes
- 609, 640
Cities and ZIP codes in Mercer County (9)
| City | ZIP codes |
|---|---|
| Trenton | 08608, 08609, 08610, 08611, 08618, 08619, 08620, 08628, 08629, 08638, 08690, 08691 |
| Princeton | 08540, 08542, 08544 |
| Hightstown | 08520 |
| Hopewell | 08525 |
| Lawrence Township | 08648 |
| Pennington | 08534 |
| Princeton Junction | 08550 |
| Titusville | 08560 |
| Windsor | 08561 |
About this page
County figures are Census county-level values (ACS 5-year); the ZIP list shows the ZIPs whose primary county this is — a ZIP on a border can also serve neighbouring counties.
Sources: U.S. Census Bureau (2020 county relationship file, ACS 5-year) · GeoNames. Methodology.