[31] Each half has its own first-aid squad, fire department substation and set of elementary schools.

Addresses in the Milton section of the township are classified under the Oak Ridge mailing city, which is shared with a portion of West Milford, or in the Newfoundland mailing area, shared with a portion of West Milford and Rockaway Township.

[32] In 2026, a new effort will be made to change the mailing address ZIP code to Lake Hopatcong, NJ 07849.

As of that year, in the section of Oak Ridge in Jefferson Township, the people there state they are from "Milton".

[37][38] The 2010 United States census counted 21,314 people, 7,830 households, and 5,794 families in the township.

[50] As of the 2000 United States census[17] there were 19,717 people, 7,131 households, and 5,448 families residing in the township.

[48][49] As of the 2000 Census, 25.7% of residents identified their ancestry as Italian, 22.9% Irish, 21.7% German, 11.6% English and 10.0% Polish.

Throughout the entire day, entertainment and festivities at the Jefferson Township High School are provided.

Starting in 2013 the parade has been substituted with various activities such as a fishing contest, kids kart race and a road bowling tournament.

At night, the Jefferson Township Community Band, directed by Peter Tummillo Jr., performs before the display of fireworks.

In 1982, the township acquired the library and began the process of turning it into a museum, after Emily Panek got a grant of $15,000 and $27,000 in donations.

[6][55] As of 2023[update], the Mayor of Jefferson Township is Republican Eric Wilsusen, whose term of office ends December 31, 2026.

[56][57][58][59][60][61][62] In March 2021, Josh Kalish was selected from a list of three candidates nominated by the Republican municipal committee to fill the council seat expiring in December 2022 that had been held by Debi Merz Bennett until she stepped down from office the previous month.

[65] In April 2016, the Township Council selected Kimberly Finnegan from three candidates nominated by the Republican municipal committee to fill the seat expiring in December 2016 that had been held by Richard W. Yocum until his resignation.

[68] Prior to the 2011 reapportionment following the 2010 census, Jefferson Township had been in the 25th state legislative district.

[69] For the 119th United States Congress, New Jersey's 11th congressional district is represented by Mikie Sherrill (D, Montclair).

[71] For the 2024-2025 session, the 25th legislative district of the New Jersey Legislature is represented in the State Senate by Anthony M. Bucco (R, Boonton Township) and in the General Assembly by Christian Barranco (R, Jefferson Township) and Aura K. Dunn (R, Mendham Borough).

[73] Actual day-to-day operation of departments is supervised by County Administrator Deena Leary.

[108] The Jefferson Township Public Schools serve students in pre-kindergarten through twelfth grade.

Interstate 80 passes through very briefly in the southern tip without any interchanges; the closest exits are 30 in Mount Arlington and 34 in neighboring Wharton.