[1][2] Asbury (with a 2010 Census population of 273[22]), Broadway (244[23]) and New Village (421[24]) are unincorporated communities and census-designated places (CDPs) located within the township.

[25][26][27] Other unincorporated communities, localities and place names located partially or completely within the township include Willow Grove.

[29][30] The township's economic data (as is all of Warren County) is calculated by the U.S. Census Bureau as part of the Allentown-Bethlehem-Easton, PA-NJ Metropolitan Statistical Area.

[42] The 2010 United States census counted 3,176 people, 1,122 households, and 885 families in the township.

Of all households, 16.9% were made up of individuals and 6.7% had someone living alone who was 65 years of age or older.

18.6% of all households were made up of individuals, and 7.6% had someone living alone who was 65 years of age or older.

[53][54][55] Prior to the 2010 Census, Franklin Township had been part of the 5th Congressional District, a change made by the New Jersey Redistricting Commission that took effect in January 2013, based on the results of the November 2012 general elections.

[56] For the 119th United States Congress, New Jersey's 7th congressional district is represented by Thomas Kean Jr. (R, Westfield).

[58] For the 2024-2025 session, the 23rd legislative district of the New Jersey Legislature is represented in the State Senate by Doug Steinhardt (R, Lopatcong Township) and in the General Assembly by John DiMaio (R, Hackettstown) and Erik Peterson (R, Franklin Township).

[63][64] Constitutional officers of Warren County are: Clerk Holly Mackey (R, Alpha; 2027),[65][66] Sheriff James McDonald Sr. (R, Phillipsburg; 2025)[67][68] and Surrogate Michael J. Doherty (R, Washington; 2025).

[72] Among the township's 2010 Census population, 66.5% (vs. 62.3% in Warren County) were registered to vote, including 88.6% of those ages 18 and over (vs. 81.5% countywide).

[84] Public school students in seventh through twelfth grades attend the schools of the Warren Hills Regional School District, which also serves students from the municipalities of Mansfield Township, Washington Borough, Washington Township and Oxford Township (for 9-12 only, attending on a tuition basis).

[85][86][87] Schools in the district (with 2022–23 enrollment data from the National Center for Education Statistics[88]) are Warren Hills Regional Middle School[89] with 468 students in grades 7 and 8 (located in Washington Borough) and Warren Hills Regional High School[90] with 1,068 students in grades 9 - 12 (located in Washington Township).

Route 22, which pass through the southern part very briefly with Exit 6 right on the border.

People who were born in, residents of, or otherwise closely associated with Franklin Township include: