[24] Peapack-Gladstone was incorporated as a borough by an act of the New Jersey Legislature on March 28, 1912, from portions of Bedminster, subject to the results of a referendum held on April 23, 1912.

[27] Peapack is home to historic Natirar as well as the Essex Hunt Club and Fox Hounds.

[32][33][34] Gill St. Bernard's School, established in 1900, is a private, nonsectarian, coeducational, college preparatory day school, serving students in pre-kindergarten through twelfth grade, located on a 208-acre (84 ha) campus that straddles the borders of Gladstone and neighboring Chester Township in Morris County.

Residents of the two communities wanted electric lights, telephones and fire hydrants and resented being forced to pay for rural roads elsewhere in the township.

[26][39] Natirar is an estate spanning 404 acres (163 ha) in Peapack-Gladstone, Far Hills and Bedminster that was sold by Hassan II of Morocco, to Somerset County and is now administered by the Somerset County Park Commission, including the 247 acres (100 ha) in Peapack-Gladstone.

[1][2] Unincorporated communities, localities and place names located partially or completely within the township include Gladstone, Peapack and Ravine Lake.

[41] Peapack-Gladstone borders other Somerset Hills communities in Somerset and Morris counties including: Bedminster to the southwest, Bernardsville to the east, Far Hills to the southeast, Chester Township to the northwest, and Mendham Township to the northeast.

[42][43][44][45][46][47] The 2010 United States census counted 2,582 people, 887 households, and 676 families in the borough.

[54] The Gladstone train station building was re-labeled "Boston," and its surroundings were supplied with peat-moss dirt, period vehicles and extras in Victorian dress, for a 1962 movie shoot.

In the Oscar-winning film The Miracle Worker, Anne Bancroft in the role of Annie Sullivan boards a long-distance steam train there to take the job as Helen Keller's teacher.

[55] The borough was a major shooting location of the CBS soap opera Guiding Light from 2007 until the show's conclusion in 2009.

[34] The borough is home to Stronghold Soccer Club, which plays its matches at Mount St. John's on the grounds of Montgomery Academy.

[59] Emergency medical services are provided by the non-profit, all-volunteer Peapack Gladstone First Aid Squad, known as "51 Rescue", based at a newly renovated location on St. Lukes Avenue.

[7] The borough form of government used by Peapack-Gladstone is a "weak mayor / strong council" government in which council members act as the legislative body with the mayor presiding at meetings and voting only in the event of a tie.

The mayor can veto ordinances subject to an override by a two-thirds majority vote of the council.

[63][64][65] As of 2022[update], the mayor of Peapack-Gladstone is Independent Gregory Skinner, whose term of office ends December 31, 2022.

[3][66][67][68][69][70][71] Borough offices are located at the former school building, in the same facility as the local library and police department.

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

[76] For the 2024-2025 session, the 21st legislative district of the New Jersey Legislature is represented in the State Senate by Jon Bramnick (R, Westfield) and in the General Assembly by Michele Matsikoudis (R, New Providence) and Nancy Munoz (R, Summit).

[94] Among the borough's 2010 Census population, 67.5% (vs. 60.4% in Somerset County) were registered to vote, including 91.8% of those ages 18 and over (vs. 80.4% countywide).

[119] U.S. Route 206 is the most prominent highway directly serving the borough, connecting to points north and south.

NJ Transit's Gladstone station[122] is the terminus of the Gladstone Branch of the Morris and Essex Lines, taking many of the borough's commuters to Hoboken and New York Penn Station in Midtown Manhattan daily.