The Lawrenceville School is a coeducational preparatory school for boarding and day students located in the Lawrenceville section of Lawrence Township, in Mercer County, in the U.S. state of New Jersey. Lawrenceville is a member of the Eight Schools Association and the Ten Schools Admissions Organization.

Lawrenceville is an unincorporated community and census-designated place (CDP) and a major commercial hub within Lawrence Township in Mercer County, in the U.S. state of New Jersey. The community is situated roughly halfway between Princeton and Trenton, although Lawrenceville constitutes part of the New York metropolitan area, the CDP actually is located approximately 15 miles closer to Philadelphia than to New York City; and as with the remainder of Mercer County, lies within the Federal Communications Commission's Philadelphia Designated Market Area. As of the 2020 United States census, the CDP's population was 3,751, a decrease of 136 (−3.5%) from the 3,887 recorded at the 2010 census, which in turn had reflected a decrease of 194 (−4.8%) from the 4,081 counted in the 2000 census.