[1][2] Unincorporated communities, localities and place names located partially or completely within the township include Bowentown, Cohansey, Dutch Neck, Harmony, Irlands Mills, Lakeside-Beebe Run, Mary Elmer Lake, Roadstown, and West Park.

[22][23][24] Mary Elmer Lake is a reservoir on the Cohansey River in Hopewell Township and Bridgeton that covers 22.2 acres (9.0 ha) and is used for water-supply and recreation purposes.

[25] The 2010 United States census counted 4,571 people, 1,662 households, and 1,200 families in the township.

Of all households, 24.2% were made up of individuals and 14.2% had someone living alone who was 65 years of age or older.

[39] As of the 2000 United States census[13] there were 4,434 people, 1,628 households, and 1,206 families residing in the township.

22.9% of all households were made up of individuals, and 12.9% had someone living alone who was 65 years of age or older.

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

[50] For the 2024-2025 session, the 3rd legislative district of the New Jersey Legislature is represented in the State Senate by John Burzichelli (D, Paulsboro) and in the General Assembly by David Bailey (D, Woodstown) and Heather Simmons (D, Glassboro).

[51] Cumberland County is governed by a Board of County Commissioners composed of seven members who are elected at large by the citizens of Cumberland County in partisan elections and serve staggered three-year terms in office, with either two or three seats coming up for election each year in a three-year cycle.

[52] As of 2025[update], members of the Cumberland County Board of County Commissioners (with party affiliation, residence and term-end year listed in parentheses) are: Douglas A. Albrecht (R, Vineland, 2025),[53] Deputy Director Antonio Romero (R, Vineland, 2027),[54] Sandra Taylor (R, Downe Township; 2026),[55] Victoria Groetsch-Lods (R, Vineland, 2025),[56] Arthur Marchand (R, Hopewell Township, 2026),[57] James Sauro (R, Vineland, 2026)[58] and Robert A. Austino (D, Bridgeton, 2027).

[72][73] In the 2008 presidential election, Republican John McCain received 55.8% of the vote (1,248 cast), ahead of Democrat Barack Obama, who received 40.9% (913 votes), with 2,235 ballots cast among the township's 3,125 registered voters, for a turnout of 71.5%.

[74] In the 2004 presidential election, Republican George W. Bush received 59.4% of the vote (1,265 ballots cast), outpolling Democrat John Kerry, who received around 38.9% (828 votes), with 2,130 ballots cast among the township's 2,886 registered voters, for a turnout percentage of 73.8.

[97] New Jersey Route 49 is the main highway providing access to Hopewell Township.

[99][100] People who were born in, residents of, or otherwise closely associated with Hopewell Township include: