Eastampton Township was incorporated as a township by an Act of the New Jersey Legislature on February 11, 1880, from portions of Westampton Township. Portions of both Lumberton Township and Southampton Township were annexed in 1882.
Eastampton Township borders Mount Holly Township, Westampton Township, Springfield Township, Pemberton Township, Southampton Township, and Lumberton Township
There were 2,226 households out of which 42.2% had children under the age of 18 living with them, 61.2% were married couples living together, 8.4% had a female householder with no husband present, and 26.4% were non-families. 21.5% of all households were made up of individuals and 4.5% had someone living alone who was 65 years of age or older. The average household size was 2.78 and the average family size was 3.29.
In the township the population was spread out with 29.5% under the age of 18, 7.0% from 18 to 24, 35.3% from 25 to 44, 21.0% from 45 to 64, and 7.2% who were 65 years of age or older. The median age was 35 years. For every 100 females there were 99.0 males. For every 100 females age 18 and over, there were 98.2 males.
The median income for a household in the township was $66,406, and the median income for a family was $71,765. Males had a median income of $46,486 versus $31,208 for females. The per capita income for the township was $24,534. About 2.0% of families and 2.9% of the population were below the poverty line, including 2.0% of those under age 18 and 4.3% of those age 65 or over.
Members of the Eastampton Township Council are Mayor Rich Renzulli, Deputy Mayor Don Hartman, Joe Maroccia,Keith Nagler and Walt Tafe.
Public school students in grades 9 - 12 attend the Rancocas Valley Regional High School, a regional public high school serving students in grades 9 through 12 from five communities encompassing approximately 40 square miles and composed of the communities of Eastampton Township, Hainesport Township, Lumberton Township, Mount Holly Township and Westampton Township. The current enrollment of the school is approximately 2,250 students. The school is located in Mount Holly Township and is part of the Rancocas Valley Regional High School District.