Residential delivery area · New Jersey
ZIP Code 07823: Belvidere, NJ
ZIP code 07823 uses the postal name Belvidere, New Jersey and lies entirely in Warren County (Census 2020 ZIP-county file). About 7,500 people live there (Census Bureau, ACS 2020-2024). Median household income is $85,522 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Belvidere (6%), Mountain Lake (5%), Bridgeville (4%) and Brookfield (3%), and under 1% in smaller places; 82% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Belvidere · its only residential ZIP
- County
- Warren County
- Census places
- Belvidere (6%); Mountain Lake (5%) census-designated place; Bridgeville (4%) census-designated place; Brookfield (3%) census-designated place
- Metro area
- Allentown-Bethlehem-Easton, PA-NJ
- House district
- NJ-7 119th Congress
- State
- New Jersey
- Time zone
- Eastern
- Land area
- 25.1 sq mi · 297 people per sq mi
Where is ZIP code 07823?
07823 centers on 40.823°, -75.046° and covers 25.1 square miles of land plus 0.4 of water. It borders 8 ZIP codes: 07863, 07882, 18343, 18013, 07838, 07832, 08865, 07825.
The map draws ZIP code areas only. For the streets inside 07823, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 07823 compare with the rest of Warren County?
| Measure | 07823 | In Warren County | In NJ |
|---|---|---|---|
| People (ACS 2020-2024) | 7,451 | 8th of 22 | 369th of 598 |
| Median household income | $86k | 13th of 14 | 383rd of 476 |
| Median home value | $322k | 14th of 16 | 424th of 515 |
Its median household income is higher than in 69% of U.S. residential ZIP codes, and it is denser than 67% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 07823?
The 2020 Census counted 7,102 people in 07823; the ACS, which samples households over 2020-2024, estimates 7,451. Between the 2010 and 2020 censuses its population fell 6.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 7,451
- 2020 Census count
- 7,102−6.2% since 2010 (7,571)
- Households
- 3,512
- Median age
- 55.4
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 07823?
Of the 7,451 people the ACS estimates in 07823, 14.3% are under 18 and 26.9% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (90.1%).
- Under 1814.3%
- 18 to 6458.7%
- 65 and older26.9%
- White, not Hispanic90.1%
- Hispanic or Latino6.1%
- Black, not Hispanic1.5%
- Asian, not Hispanic1.2%
- Other or two or more1.1%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 07823 earn?
Median household income is $85,522 (ACS 2020-2024), the 13th highest of the 14 ranked ZIP codes in Warren County. It is not measurably different from 2015-2019 ($74,653 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $85,522±$15,815
- Income per person
- $43,980
- Below the poverty line
- 8.4%
- Unemployed (of the labor force)
- 2.6%
- Adults 25+ with a bachelor's degree
- 23.1%
- Adjusted gross income per tax return, 2022
- $74,4033,730 returns; wages 66% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 07823?
FHFA's house price index for 07823, built from repeat sales and appraisals of the same homes, rose 85% from 2015 to 2025 and rose 60% from 2020 to 2025, and moved +6.7% in 2025.
- Median home value (owners' estimate)
- $322,000
- Median gross rent
- $966
- Homes owned by their occupants
- 67.5%
- Housing units
- 3,672
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 07823?
135 business establishments had a location in this ZIP code in 2023, 6 more than in 2018; the most are in other services (except public administration) (ZIP Code Business Patterns).
- Other services (except public administration)23
- Accommodation and food services22
- Construction20
- Retail trade15
- Health care and social assistance13
- Professional, scientific, and technical services11
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 07823?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 07863 | Oxford | 3,819 | $94k | 4.8 mi |
| 07882 | Washington | 15,115 | $108k | 5.0 mi |
| 18343 | Mount Bethel, PA | 3,637 | $81k | 5.7 mi |
| 18013 | Bangor, PA | 17,597 | $79k | 6.6 mi |
| 07838 | Great Meadows | 3,727 | $122k | 8.3 mi |
| 07832 | Columbia | 3,593 | $106k | 8.5 mi |
| 08865 | Phillipsburg | 31,427 | $80k | 9.5 mi |
| 07825 | Blairstown | 9,210 | $124k | 11.9 mi |
| 07833 | Delaware | 70 | – | 5.0 mi (near) |
| 07844 | Hope | 111 | $80k | 7.1 mi (near) |
| 18351 | Portland, PA | 546 | $53k | 7.5 mi (near) |
| 18063 | Martins Creek, PA | 606 | $65k | 7.6 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.