[1][2] Belleplain (2010 Census population of 597[25]) is an unincorporated community and census-designated place (CDP) located within the township.

[27] Other communities, localities and place names located partially or completely within the township include Clermont, East Creek, Eldora, Mount Pleasant, North Dennis, North-West Dennis, Ocean View, Savage Pond, South Dennis, South Seaville, Stipsons Island and West Creek Landing.

[30][31][32] The 2010 United States census counted 6,467 people, 2,370 households, and 1,792 families in the township.

Of all households, 19.6% were made up of individuals and 8.6% had someone living alone who was 65 years of age or older.

[45] As of the 2000 United States census[14] there were 6,492 people, 2,159 households, and 1,737 families residing in the township.

The Committee members serve in a part-time capacity and receive an annual salary.

The first five-member committee took office in January 1991 at which time the governing body established the position of Township Administrator.

[54] In November 2018, Matthew J. Cox was elected to serve the balance of the term of office.

[57][58][59] For the 119th United States Congress, New Jersey's 2nd congressional district is represented by Jeff Van Drew (R, Dennis Township).

[61] For the 2024-2025 session, the 1st legislative district of the New Jersey Legislature is represented in the State Senate by Mike Testa (R, Vineland) and in the General Assembly by Antwan McClellan (R, Ocean City) and Erik K. Simonsen (R, Lower Township).

[62] Cape May County is governed by a five-person Board of County Commissioners whose members are elected at-large on a partisan basis to three-year terms of office on a staggered basis, with either one or two seats coming up for election each year; At an annual reorganization held each January, the commissioners select one member to serve as director and another to serve as vice-director.

[63] As of 2025[update], Cape May County's Commissioners are Director Leonard C. Desiderio (R, Sea Isle City, 2027),[64] Robert Barr (R, Ocean City; 2025),[65] Will Morey (R, Wildwood Crest; 2026),[66] Melanie Collette (R. Middle Township; 2026),[67] and Vice-Director Andrew Bulakowski (R, Lower Township; 2025).

[68][63][69] The county's constitutional officers are Clerk Rita Marie Rothberg (R, 2025, Ocean City),[70][71] Sheriff Robert Nolan (R, 2026, Lower Township)[72][73] and Surrogate E. Marie Hayes (R, 2028, Ocean City).

[78][79] In the 2008 presidential election, Republican John McCain received 55.4% of the vote (1,904 cast), ahead of Democrat Barack Obama, who received 42.4% (1,459 votes), with 3,437 ballots cast among the township's 4,331 registered voters, for a turnout of 79.4%.

[80] In the 2004 presidential election, Republican George W. Bush received 58.1% of the vote (1,977 ballots cast), outpolling Democrat John Kerry, who received around 40.0% (1,362 votes), with 3,401 ballots cast among the township's 4,424 registered voters, for a turnout percentage of 76.9.

[90] The Dennis Township Public Schools serve students in pre-kindergarten through eighth grade.