Princeton, New Jersey Map and Directory

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According to the United States Census Bureau, Princeton is classified as an "Other" type of place that is located in Mercer County, New Jersey at 40.35 degrees North and 74.66 degrees West. The place's time zone is America/New York, and the place's primary telephone area code is 609. The land area of Princeton is about 17.93 square miles, whereas the water area of the place is about 0.43 square miles. Mercer County's land area is about 225 square miles, so the place occupies about 8.0 percent of the county's total land area.

The Census Bureau estimates that Princeton had about 31,187 residents in 2019, which is approximately 1,739 people per square mile of land area.

According to recent American Community Survey data, the median household income in Princeton was about $137,672 per year.

The New Jersey counties map at upper right shows Mercer County, highlighted in red. Use the menu below to display interactive maps of Princeton, either in a frame on this page or in full-screen mode.

Use the menu below to display categorized Princeton directories.

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