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is a city in Lawrence County, Illinois, along the Embarras River. The population was 4,745 at the 2000 census. It is the county seat of Lawrence County. 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, and back-to-back in 1982 and 1983, which had a combined two season win-loss record of 68-0. The team was coached by Ron Felling, who, after the 1983 season at Lawrenceville, went on to Indiana as assistant coach to Bobby Knight.
According to the United States Census Bureau, the city has a total area of 2.0 square miles (5.2 km²), all of it land.