[1][2] Mountain Lake (with a 2010 census population of 575[21]) is an unincorporated community and census-designated place (CDP) located within the township.

[22][23][24] Other unincorporated communities, localities and place names located partially or completely within the township include Danville, Great Meadows and Townsbury.

[27][28] The Township's economic data (as is all of Warren County) is included by the U.S. Census Bureau as part of the Allentown-Bethlehem-Easton, PA-NJ Metropolitan Statistical Area.

The 2010 United States census counted 2,942 people, 1,047 households, and 789 families in the township.

Of all households, 18.4% were made up of individuals and 7.3% had someone living alone who was 65 years of age or older.

17.6% of all households were made up of individuals, and 6.6% had someone living alone who was 65 years of age or older.

[5][35] At an annual reorganization meeting, the Township Committee selects one of its members to serve as Mayor.

[3][36][37][38][39] Carl Cummins was appointed to fill the vacant seat of John Fisher, who had died in September 2013, after the deadline to remove his name from the ballot and who won a seat in the November 2013 general election.

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

[45] 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).

[50][51] Constitutional officers of Warren County are: Clerk Holly Mackey (R, Alpha; 2027),[52][53] Sheriff James McDonald Sr. (R, Phillipsburg; 2025)[54][55] and Surrogate Michael J. Doherty (R, Washington; 2025).

[59] Among the township's 2010 Census population, 64.5% (vs. 62.3% in Warren County) were registered to vote, including 85.1% of those ages 18 and over (vs. 81.5% countywide).

[69][70] The New Jersey Superior Court, Appellate Division blocked a 2007 effort by Liberty Township to leave the Great Meadows district based on Liberty's greater share of district costs, with the court citing the inability of the two communities to provide an efficient education separately.

[85] The only major road to pass through is U.S. Route 46, which runs for 3.18 miles (5.12 km) in the township's southeastern area.

[86] The closest limited access road is Interstate 80 (the Bergen-Passaic Expressway) in neighboring Hope Township.