Lynnfield is a town in Essex County, Massachusetts, in the United States. As of the 2000 census, the town population was 11,542. As of the census of 2010, there were 11,596 people, 4,179 households, and 3,267 families residing in the town. The population density was 1,143 people per square mile (439.5/km²). There were 4,354 housing units at an average density of 429.2 per square mile (162.7/km²). The racial makeup of the town was 94.7% White, 0.5% Black or African American, 3.3% Asian, 0% Pacific Islander, 0.4% from other races, and 1% from two or more races. Hispanic or Latino of any race were 1.7% of the population.