Mercer
Source:
New Jersey
Mercer is a major-metro county in New Jersey with 22 ZIP codes, 390,132 people, and top-decile household income among US counties. All data is sourced from the U.S. Census Bureau American Community Survey (ACS) 2023 5-Year Estimates.
National county placement
According to ACS 5-Year Estimates, Mercer, NJ sits among US counties with a top-decile household income, on a major-metro county population base, across a multi-ZIP patchwork.
- Top 3%
- household income vs 3,210 US counties
- 390,132
- combined ZIP population
- 22
- USPS ZIP codes covered
- $113,696
- avg ZIP median income
Income percentile ranks this county's average ZIP median household income against 3,210 US counties with ACS income on at least one ZIP.
Mercer lands in the national county income distribution as top-decile household income on major-metro county footing (FIPS 34021, 22 ZIPs, combined population 390,132). Sort the ZIP table by population before treating the county mean as uniform.
High-income counties with wide ZIP mosaics hide sharp internal gradients. The densest ZIP here is 08540 (Princeton) with 47,115 residents - open it beside a thin rural code from the table before treating the county mean as uniform. HUD Fair Market Rents and FBI county tables attach to FIPS 34021, so scorecards stay county-keyed while household income stays ZIP-keyed.
Save two ZIPs from the table into your shortlist, then open a compare link - that is the return path a static county summary cannot replace. All figures here come from Census ACS 2023 5-Year Estimates and USPS ZCTA files.
22
Total ZIPs
390,132
Total Population
ZIP Codes in Mercer
Side-by-side: Compare 08540 vs 08618 →
| ZIP Code | City | Population | Density |
|---|---|---|---|
| 08540 | Princeton | 47,115 | 350 |
| 08618 | Trenton | 38,229 | 2,432 |
| 08648 | Lawrence Township | 32,263 | 745 |
| 08610 | Trenton | 30,468 | 1,525 |
| 08611 | Trenton | 28,038 | 4,115 |
| 08520 | Hightstown | 27,869 | 613 |
| 08638 | Trenton | 22,832 | 1,532 |
| 08619 | Trenton | 22,723 | 879 |
| 08550 | Princeton Junction | 19,445 | 404 |
| 08690 | Trenton | 18,567 | 1,023 |
| 08691 | Trenton | 15,104 | 223 |
| 08620 | Trenton | 14,693 | 633 |
| 08609 | Trenton | 13,546 | 3,830 |
| 08534 | Pennington | 12,929 | 228 |
| 08629 | Trenton | 12,331 | 5,979 |
| 08512 | Cranbury | 10,105 | 184 |
| 08628 | Trenton | 9,054 | 501 |
| 08542 | Princeton | 5,189 | 3,868 |
| 08525 | Hopewell | 4,767 | 83 |
| 08560 | Titusville | 3,656 | 104 |
| 08608 | Trenton | 983 | 1,195 |
| 08561 | Windsor | 226 | 73 |
Frequently Asked Questions
What is the population of Mercer?
Mercer has a total population of 390,132 across 22 ZIP codes, based on U.S. Census Bureau ACS 2023 data.
What ZIP codes are in Mercer?
Mercer includes 22 ZIP codes: 08540, 08618, 08648, 08610, 08611, 08520, 08638, 08619, 08550, 08690, and more.