Located halfway between Princeton and Trenton, this village and township were founded as Maidenhead, perhaps because of its taverns and the activities therein. The town and township were renamed after the War of 1812 to honor naval hero James Lawrence (famous for saying "Don't give up the ship" during the Battle of Lake Erie.
Lawrenceville is the host to a 150 year old boarding school Lawrenceville School. The township is also the home to Bristol-Myers Squibb's world headquarters, the Lenox corporation, and Educational Testing Service's headquarters
As of the census of 2000, there are 4,081 people, 1,747 households, and 1,070 families residing in the town. The population density is 1,515.1/km² (3,926.5/mi²). There are 1,776 housing units at an average density of 659.3/km² (1,708.7/mi²). The racial makeup of the town is 88.12% White, 3.58% African American, 0.07% Native American, 6.30% Asian, 0.00% Pacific Islander, 0.54% from other races, and 1.40% from two or more races. 3.46% of the population are Hispanic or Latino of any race.
There are 1,747 households out of which 32.2% have children under the age of 18 living with them, 48.7% are married couples living together, 10.5% have a female householder with no husband present, and 38.7% are non-families. 32.3% of all households are made up of individuals and 8.6% have someone living alone who is 65 years of age or older. The average household size is 2.33 and the average family size is 2.99.
In the town the population is spread out with 24.2% under the age of 18, 5.8% from 18 to 24, 32.2% from 25 to 44, 27.7% from 45 to 64, and 10.1% who are 65 years of age or older. The median age is 39 years. For every 100 females there are 83.7 males. For every 100 females age 18 and over, there are 77.7 males.
The median income for a household in the town is $74,107, and the median income for a family is $98,972. Males have a median income of $65,189 versus $37,972 for females. The per capita income for the town is $37,919. 1.7% of the population and 0.6% of families are below the poverty line. Out of the total people living in poverty, 0.0% are under the age of 18 and 4.1% are 65 or older.