[18] Sandyston's growth in recent years has been attributed to the influx of people from more urban parts of the state and even New York City, located less than 75 miles (121 km) away.

[19] Sandyston was first formed by royal charter on February 26, 1762, from portions of Walpack Township.

A ridge runs along the eastern half of the township called the Kittatinny Mountains.

The highest point in the township is Sunrise Mountain in Stokes State Forest.

The lowest point is around the Delaware River in the western half of the township.

Unincorporated communities, localities and place names located partially or completely within the township include Abertown, Bevans, Centerville, Dingmans Ferry, Hainesville, Kittatinny Lake, Lake Ashroe, Layton, Namanack Island, Normanock, Peters Valley, Shaytown, Stoney Lake and Tuttles Corner.

[22][23] The 2010 United States census counted 1,998 people, 788 households, and 561 families in the township.

22.8% of all households were made up of individuals, and 9.7% had someone living alone who was 65 years of age or older.

[3][41][42][43][44] In January 2016, the Township Committee selected Kamala "Kammy" Hull from three names nominated by the Republican municipal committee to fill the seat expiring in December 2016 that had been held by William J. Leppert until his resignation effective the previous month; Hull will serve on an interim basis until the November 2016 general election, when voters will select a candidate to serve the balance of the term of office.

[48][49][50] For the 119th United States Congress, New Jersey's 5th congressional district is represented by Josh Gottheimer (D, Wyckoff).

[53] For the 2024-2025 session, the 24th legislative district of the New Jersey Legislature is represented in the State Senate by Parker Space (R, Wantage Township) and in the General Assembly by Dawn Fantasia (R, Franklin) and Mike Inganamort (R, Chester Township).

At an annual reorganization meeting held in the beginning of January, the board selects a Commissioner Director and Deputy Director from among its members, with day-to-day supervision of the operation of the county delegated to a County Administrator.

[65] Among the township's 2010 census population, 67.5% (vs. 65.8% in Sussex County) were registered to vote, including 87.1% of those ages 18 and over (vs. 86.5% countywide).

[82][83] The high school is located on a 96-acre (39 ha) campus in Hampton Township, about seven minutes outside of the county seat of Newton.

The Dingman's Ferry Bridge, one of the last privately owned toll bridges on the Delaware River and one of the last few in the United States, carries two lanes of PA 739 and NJ County Route 560, connecting to Delaware Township, Pike County, Pennsylvania.

[87] People who were born in, residents of, or otherwise closely associated with Sandyston Township include: