Mount Laurel Township was incorporated as a township by an Act of the New Jersey Legislature on March 7, 1872, from portions of Evesham Township.
Ramblewood is a census-designated place and unincorporated area located within Mount Laurel Township.
As of the census of 2000, there were 40,221 people, 16,570 households, and 11,068 families residing in the township. The population density was 1,844.3 people per square mile (712.0/km²). There were 17,163 housing units at an average density of 787.0/sq mi (303.8/km²). The racial makeup of the township was 87.10% White, 6.92% African American, 0.09% Native American, 3.80% Asian, 0.03% Pacific Islander, 0.64% from other races, and 1.41% from two or more races. Hispanic or Latino of any race were 2.24% of the population.
There were 16,570 households out of which 30.4% had children under the age of 18 living with them, 55.7% were married couples living together, 8.5% had a female householder with no husband present, and 33.2% were non-families. 27.9% of all households were made up of individuals and 8.9% had someone living alone who was 65 years of age or older. The average household size was 2.41 and the average family size was 2.98.
In the township the population was spread out with 23.1% under the age of 18, 5.4% from 18 to 24, 32.7% from 25 to 44, 24.2% from 45 to 64, and 14.7% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 89.4 males. For every 100 females age 18 and over, there were 85.8 males.
The median income for a household in the township was $63,750, and the median income for a family was $76,288. Males had a median income of $55,597 versus $37,198 for females. The per capita income for the township was $32,245. About 2.5% of families and 3.1% of the population were below the poverty line, including 3.9% of those under age 18 and 2.9% of those age 65 or over.
The New Jersey Turnpike passes through Mount Laurel Township. The Turnpike's James Fenimore Cooper rest area is located between Interchanges 4 and 5 northbound at milepost 39.4. Mount Laurel hosts Exit 4 of the Turnpike, with the 4 toll gate consisting of 8 lanes at the gate.
Interstate 295 passes through the township, with three exits (Exit 36: Berlin/Tacony Bridge/Route 73, Exit 40: Moorestown/Mount Holly/Route 38, Exit 43: Delran/Rancocas Woods). Two other major thoroughfares through Mount Laurel are Route 38 and Route 73.
New Jersey Transit provides bus service to Philadelphia on the 317 and 413 bus routes, with local service on the 457 line.