Lawrence is a city in Essex County, Massachusetts, United States 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. Manufacturing products of the city include electronic equipment, textiles, footwear, paper products, computers, and foodstuffs. Lawrence was, for a while, the residence of Robert Frost, where he published his first poem.