Named for William Livingston, the first post-colonial governor of New Jersey, the township was supported by the lumber, dairy and shoe industries until after World War II, when the population exploded. From 1950 through 1970, Livingston tripled in population to 31,653 from 9,932.

According to the 2000 census, 80 percent of Livingston's homes were built between 1940 and 1980. The township's 9,000 or so single-family houses range from small 750-square-foot Cape Cods, ranches and prewar colonials near the center of town to multimillion-dollar mansions.

As of the censusGR2 of 2000, there were 27,391 people, 9,300 households, and 7,932 families residing in the town. The population density was 761.9/km² (1,973.1/mi²). There were 9,457 housing units at an average density of 263.1/km² (681.2/mi²). The racial makeup of the township was 82.64% White, 1.20% African American, 0.05% Native American, 14.54% Asian, 0.01% Pacific Islander, 0.69% from other races, and 0.87% from two or more races. Hispanic or Latino of any race were 2.54% of the population. According to the 2002 results of the National Jewish Population Survey, there are 12,600 Jews in Livingston, approximately 46% of the population. This is one of the higher percentages of Jews in any American municipality.

There were 9,300 households out of which 41.8% had children under the age of 18 living with them, 76.0% were married couples living together, 7.0% had a female householder with no husband present, and 14.7% were non-families. 13.0% of all households were made up of individuals and 8.4% had someone living alone who was 65 years of age or older. The average household size was 2.93 and the average family size was 3.21.

In the township the population was spread out with 26.6% under the age of 18, 4.6% from 18 to 24, 26.6% from 25 to 44, 26.8% from 45 to 64, and 15.4% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 94.7 males. For every 100 females age 18 and over, there were 90.3 males.

The median income for a household in the township is $98,869, and the median income for a family was $108,049. Males had a median income of $77,256 versus $41,654 for females. The per capita income for the town was $47,218. About 1.1% of families and 1.8% of the population were below the poverty line, including 1.2% of those under age 18 and 3.2% of those age 65 or over.