Lawrenceville is a city in and the county seat of Lawrence County, Illinois, United States, located along the Embarras River. The population was 4,348 at the 2010 census. Lawrenceville is located in southeast Illinois, northwest of Vincennes, Indiana. The city is home of the Lawrenceville "Indians", Illinois Class A high school state basketball champions in 1972, 1974, 1982 and 1983. The team had a combined two season win–loss record of 68-0 from 1982–83.