ZIP code · Monroe Township · New Jersey · United States
ZIP code 08831 — Monroe Township
ZIP code 08831 serves Monroe Township, New Jersey.
- Postal code
- 08831Single source Value from one source, not cross-checked.
- City
- Monroe Township
- County
- Middlesex FIPS 34023
- State
- New Jersey
- Country
- United States
- Coordinates
- 40.3192, -74.4285 — precision estimated (postal-area centroid)
View on OpenStreetMap - Population
- 54,608 (ZCTA, ACS 5-year)
- Population density
- 1,064 / sq mi
- Land area
- 51.3 sq mi (132.9 km²) (ZCTA, ACS 5-year)
- Median household income
- $108,741
- Per-capita income
- $66,565
- Median age
- 54.9
- Households
- 23,858
- Housing units
- 24,898
- Median home value
- $489,700
- Median gross rent
- $1,872 / month
- Congressional district
- NJ-12 (119th Congress)
- USDA hardiness zone
- 7a (0 to 5 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 08831 with another ZIP · ZIPs within 25 miles · distance from 08831
Map of ZIP code 08831
Climate — monthly normals
Warmest month Jul (avg high 87°F), coldest Jan (avg low 21°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 41 | 43 | 51 | 63 | 73 | 82 | 87 | 85 | 78 | 66 | 55 | 46 |
| Avg low °F | 21 | 23 | 30 | 39 | 48 | 58 | 63 | 61 | 54 | 42 | 33 | 27 |
| Precip in | 3.5 | 2.6 | 4.3 | 3.7 | 4.1 | 4.6 | 4.8 | 4.3 | 4.2 | 4.0 | 3.3 | 4.2 |
NOAA 1991–2020 climate normals from the nearest station: HIGHTSTOWN 2 W (8.0 mi) · NOAA NCEI
Places in ZIP 08831
- 14 schools
- 1 hospitals & clinics
- 4 doctors & dentists
- 1 supermarkets
- 17 restaurants & cafés
- 8 parks
- 4 playgrounds
- 10 gyms & sports centres
- 2 libraries
- 2 post offices
- 13 places of worship
- 4 banks
- 9 gas stations
- 1 EV charging stations
- 4 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page