[1][2] Rosenhayn (2010 population of 1,098[24]) is an unincorporated community and census-designated place (CDP) located within Deerfield Township.

[25] Other unincorporated communities, localities and place names located partially or completely within the township include Carmel and Garton.

[27][28] The 2010 United States census counted 3,119 people, 1,089 households, and 810 families in the township.

Of all households, 20.2% were made up of individuals and 9.0% had someone living alone who was 65 years of age or older.

[41] As of the 2000 United States census[15] there were 2,927 people, 1,013 households, and 785 families residing in the township.

17.6% of all households were made up of individuals, and 8.2% had someone living alone who was 65 years of age or older.

As of 2023[update], members of the Deerfield Township Committee are Mayor Abigail Perlstein O'Brien (R, term on committee ends December 31, 2024; term as mayor ends December 31, 2022), Deputy Mayor Brian L. Casper (R, term on committee ends 2025; term as deputy mayor ends 2023), Anthony A. Brago (R, 2023), Anthony Lamanteer (R, 2025) and Dominick Patitucci (R, 2024).

[49] At the township's January 2015 reorganization meeting, Sparacio was sworn in using a conference call as he was stationed outside the country as part of his service with the Air National Guard.

[52][53][54] For the 119th United States Congress, New Jersey's 2nd congressional district is represented by Jeff Van Drew (R, Dennis Township).

[56] 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).

[58] 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),[59] Deputy Director Antonio Romero (R, Vineland, 2027),[60] Sandra Taylor (R, Downe Township; 2026),[61] Victoria Groetsch-Lods (R, Vineland, 2025),[62] Arthur Marchand (R, Hopewell Township, 2026),[63] James Sauro (R, Vineland, 2026)[64] and Robert A. Austino (D, Bridgeton, 2027).

[78][79] In the 2008 presidential election, Democrat Barack Obama received 52.0% of the vote (744 cast), ahead of Republican John McCain, who received 46.1% (659 votes), with 1,431 ballots cast among the township's 2,066 registered voters, for a turnout of 69.3%.

[80] In the 2004 presidential election, Democrat John Kerry received 51.0% of the vote (665 ballots cast), outpolling Republican George W. Bush, who received around 47.5% (619 votes), with 1,303 ballots cast among the township's 1,847 registered voters, for a turnout percentage of 70.5.

[97][98][99] Cumberland County Technical Education Center is a public countywide school in Millville.

[101] New Jersey Route 56 is the main highway providing access to Deerfield Township.