Lawrence is a city in Essex County, Massachusetts on the Merrimack River. As of the 2000 census, the city had a total population of 72,043. Surrounding communities include Methuen to the north, Andover to the southwest, and North Andover to the southeast. It and Salem are the county seats of Essex County. Lawrence is also part of the Merrimack Valley. Lawrence apartments for rent comparison page shows most up to date rent information on Lawrence apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.