Located at the cross-roads between the Delaware Valley region to the southwest and the Raritan Valley region to the northeast, the township considered an exurb of New York City in the New York metropolitan area as defined by the United States Census Bureau,[19] while also directly bordering the Philadelphia metropolitan area, being a part of the Federal Communications Commission's Philadelphia Designated Market Area.

Today, Washington Crossing State Park commemorates this important milestone in American history.

[26] Hopewell Township was also the location where—two months after being abducted from his home in neighboring East Amwell—the body of Charles Lindbergh Jr. was discovered on May 12, 1932.

[27] In May 2023, a home in the township had its roof pierced by a stony chondrite meteorite weighing 986 grams (34.8 oz).

Baldpate Mountain, in the western part of the township, is the highest hill, at 480 feet (150 m) above sea level.

[29] The lowest elevation is between 20 and 40 feet, located where Jacobs Creek joins the Delaware River in the southwestern corner of the township.

[34] Some neighborhoods in the township include Hopewell Hunt, Brandon Farms and Elm Ridge.

[7][51] At an annual reorganization meeting, the Township Committee selects one of its members to serve as Mayor.

[3][52][53][54][55][56] In December 2022, David Chait was selected from a list of three prospective candidates nominated by the Democratic municipal committee to fill the seat expiring in December 2022 that had been held by Kristin McLaughlin until she left office to take a seat in the Mercer County Board of County Commissioners.

[58] In the November 2015 general election, Democrat Julie Blake defeated incumbent Mayor Harvey Lester, with affordable housing, development and taxes as key issues in the race.

[59] Hopewell Township is served by the New Jersey Agricultural Experiment Station & Rutgers Cooperative Extension of Mercer County, located in Trenton.

[62][63][64] For the 119th United States Congress, New Jersey's 12th congressional district is represented by Bonnie Watson Coleman (D, Ewing Township).

[69] As of 2025[update], the County Executive is Daniel R. Benson (D, Hamilton Township) whose term of office ends December 31, 2027.

[112][113] The district's Board of Education is comprised of nine members, which are allocated to each of the three municipalities based on population, with Hopewell Township assigned seven seats.

[114] Eighth grade students from all of Mercer County are eligible to apply to attend the high school programs offered by the Mercer County Technical Schools, a county-wide vocational school district that offers full-time career and technical education at its Health Sciences Academy, STEM Academy and Academy of Culinary Arts, with no tuition charged to students for attendance.

The district was added to the National Register of Historic Places on June 14, 1991, for its significance in agriculture, architecture, and exploration/settlement.

[119] The farm was first created by Joseph Phillips, a blacksmith, who purchased 125 acres (51 ha) from William Bryant in 1732.

The current buildings on the property date to the 19th century, primarily before the American Civil War.

[117] The final private owner of the farm was the Howell family, who donated the land to Mercer County in 1974 for use as a museum.

[122] Route 29 passes through the southwestern part of Hopewell alongside the Delaware and Raritan Canal.

[124] Interstate 295 also passes through in the southern part;[125] the highway has two interchanges in the Township: Exits 73 (Scotch Road) and 72 (Route 31).

Originally, I-295 had extended into Hopewell Township and ended where the supposed Somerset Freeway interchange was to be built.

In March 2018, I-95 through Hopewell Township became I-295 as part of the Pennsylvania Turnpike/Interstate 95 Interchange Project that completed the gap in I-95.