Princessville is an unincorporated community located within Lawrence Township in Mercer County, in the U.S. state of New Jersey.

[2] It was home to the Colonial era Princessville Inn, formerly listed on the National Register of Historic Places, which burned down in 1982.

A cemetery still exists on Princeton Pike that dates to 1843 when the inn donated land for a Methodist Episcopal congregation.

The church relocated in 1890 and was replaced by one built by local African-American families, which was destroyed by a hurricane in 1950.

[3] The area immediately to the south is occupied by a corporate office park adjacent to the interchange between Princeton Pike and Interstate 295.