Lexington was first settled circa 1642 as part of Cambridge, Massachusetts. Lexington was incorporated as a separate town in 1713. It was then that it got the name Lexington. On April 19, 1775, what many regard as the first battle of the American Revolutionary War was a battle at Lexington. After the rout, the British march on toward Concord where the militia had been allowed time to organize at the Old North Bridge and turn back the British and prevent them from capturing and destroying the militia’s arms stores.
By the 2010 census, the population had reached 31,394. There were 11,530 households out of which 38.6% had children under the age of 18 living with them, 66.0% were married couples living together, 7.7% had a female householder with no husband present, and 24.1% were non-families. 20.8% of all households were made up of individuals and 12.3% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.10.
In 2013, the mean home price for detached houses was $852,953, and the median price of a house or condo was $718,300. According to a 2012 estimate, the median income for a household in the town was $191,350, and the median income for a family was $218,890. Males had a median income of $101,334 versus $77,923 for females. The per capita income for the town was $70,132. About 1.8% of families and 3.4% of the population were below the poverty line, including 3.2% of those under age 18 and 3.4% of those age 65 or over.
By race, the median household income was highest for mixed race households, at $263,321. Hispanic households had a median income of $233,875. Asian households had a median income of $178,988. White households had a median income of $154,533. Black households had a median income of $139,398. American Indian or Alaskan Native households had a median income of $125,139