ZIP codes
22
Mercer County, NJ Demographics & ZIP Codes
Mercer County, New Jersey demographics and median household income by ZIP code — 22 ZIP codes — population 393,958 — avg. income $112,528 — avg. home value $398,975. Compare income, housing, and ZIP-level data on US5.
Population
393,958
Median household income (avg.)
$112,528
150% of U.S. median
Average home value
$398,975
115% of U.S. median
Average rent
$1,517
130% of U.S. median
Mercer County demographics
Mercer County, New Jersey covers 22 ZIP codes, with a combined ZIP-area population of about 393,958.
Median household income in Mercer County
The average median household income across ZIP codes in Mercer County, New Jersey is about $112,528 — about 5% below the NJ ZIP average ($118,570), and about 50% above the U.S. median ($75,149).
Among ZIPs with income data, 08550 (Princeton Junction) is near the top at about $206,658, while 08618 (Trenton) is near the bottom at about $48,179.
Housing in Mercer County
For housing in Mercer County, New Jersey, the average median home value is about $398,975 and the average median rent is about $1,517.
The most populous ZIP is 08540 (Princeton) with about 49,499 residents. Use the table below to compare ZIP codes across the county.
ZIP codes in Mercer County
Sort by population, income, or home value. Click a column header to toggle ascending / descending.
| ZIP | City | County | State | Population ↓ | Income | Home value |
|---|---|---|---|---|---|---|
| 08540 | Princeton | Mercer County | NJ | 49,499 | $169,898 | $723,400 |
| 08618 | Trenton | Mercer County | NJ | 37,162 | $48,179 | $211,800 |
| 08610 | White Horse | Mercer County | NJ | 33,387 | $87,159 | $248,900 |
| 08611 | Trenton | Mercer County | NJ | 32,786 | $50,806 | $142,400 |
| 08648 | Lawrenceville | Mercer County | NJ | 31,142 | $118,036 | $395,400 |
| 08520 | Twin Rivers | Mercer County | NJ | 29,321 | $116,282 | $361,800 |
| 08619 | Mercerville | Mercer County | NJ | 23,512 | $104,922 | $320,800 |
| 08638 | Trenton | Mercer County | NJ | 23,373 | $65,650 | $226,700 |
| 08550 | Princeton Junction | Mercer County | NJ | 20,876 | $206,658 | $758,900 |
| 08690 | Hamilton Square | Mercer County | NJ | 18,996 | $122,665 | $362,700 |
| 08691 | Yardville | Mercer County | NJ | 16,924 | $129,900 | $523,500 |
| 08534 | Pennington | Mercer County | NJ | 13,174 | $180,491 | $573,100 |
| 08629 | Trenton | Mercer County | NJ | 13,015 | $81,367 | $149,000 |
| 08609 | Trenton | Mercer County | NJ | 13,000 | $56,932 | $96,700 |
| 08620 | Yardville | Mercer County | NJ | 11,949 | $108,732 | $341,000 |
| 08628 | Trenton | Mercer County | NJ | 9,479 | $101,075 | $358,100 |
| 08525 | Hopewell | Mercer County | NJ | 4,567 | $157,868 | $551,300 |
| 08544 | Princeton | Mercer County | NJ | 4,548 | — | — |
| 08560 | Titusville | Mercer County | NJ | 3,334 | $126,726 | $399,700 |
| 08542 | Princeton | Mercer County | NJ | 2,415 | $104,694 | $754,800 |
| 08608 | Trenton | Mercer County | NJ | 1,118 | — | — |
| 08561 | Windsor | Mercer County | NJ | 381 | — | $479,500 |
Frequently asked questions
What are the demographics of Mercer County?
Mercer County, New Jersey has a combined ZIP-area population of about 393,958 across 22 ZIP codes. Browse the ZIP table for population, income, and housing by code.
What is the median household income in Mercer County?
The average median household income across ZIP codes in Mercer County, New Jersey is about $112,528, about 5% below the state ZIP average ($118,570), and about 50% above the U.S. median ($75,149). Average median home value is about $398,975. Among ZIPs with data, 08550 (Princeton Junction) is near the top ($206,658) and 08618 (Trenton) is near the bottom ($48,179).
How many ZIP codes are in Mercer County?
Mercer County, New Jersey includes 22 ZIP codes on US5. Each row links to demographics, median income, and housing for that code.
Where can I find ZIP code demographics for Mercer County?
This page lists ZIP codes in Mercer County, New Jersey with population, median household income, and home value. Select a ZIP for a full demographics profile.