What is the population of Mercer County, NJ?
Mercer County in New Jersey has a population of 383,286, per Census ACS 5-Year estimates. The median household income is $96,333 and the median age is 39.2.
Context
Counties are the primary administrative subdivisions of states and a stable unit for tracking population. Mercer County's population reflects everyone within county lines, including residents of incorporated cities and unincorporated areas.
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Mercer County in New Jersey has a population of 383,286, per Census ACS 5-Year estimates. The median household income is $96,333 and the median age is 39.2.