Living Person
Mercer_County,_New_Jersey
is
As of April 13, 2026
188 years old
1 months!
Days Until Birthday
314 days
Days Since Birth
68,716 days
elapsed
Date of Birth
(February 22born, 1838 ) is
Thu
Day
Dog
Year
* Calculated from Wikipedia data.
Accuracy is not guaranteed.
Cosmic Age Calculator
Moon
2515.2 years old
Mercury
781.1 years old
Venus
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100 years old
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Mercer County, New Jersey | |
|---|---|
 The New Jersey State House and its golden dome in Trenton in 2006 | |
 Flag  Seal | |
| Nickname: The Capital County | |
 Location within the U.S. state of New Jersey | |
 Interactive map of Mercer County, New Jersey | |
| Coordinates: 40°17′N 74°42′W / 40.28°N 74.70°W | |
| Country |  United States |
| State |  New Jersey |
| Founded | 1838 |
| Named after | Hugh Mercer |
| Seat | Trenton |
| Largest municipality | Hamilton Township (population) Hopewell Township (area) |
| Government | |
| • County executive | Daniel R. Benson (D, term ends December 31, 2027) |
| Area | |
• Total | 228.86 sq mi (592.7 km) |
| • Land | 224.44 sq mi (581.3 km) |
| • Water | 4.42 sq mi (11.4 km) 1.9% |
| Population (2020) | |
• Total | 387,340  |
• Estimate (2025) | 399,289 |
| • Density | 1,725.8/sq mi (666.34/km) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional districts | 3rd, 12th |
| Website | mercercounty |
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