Jefferson County is located in the U.S. state of Pennsylvania. The county seat is Brookville. The county was created on March 26, 1804, from part of Lycoming County and later organized in 1812.

Jefferson County is part of the DuBois, PA Micropolitan Statistical Area.

The county is governed by a three-member Board of Commissioners, who are elected every four years. The county is divided into nine townships, which are administered by elected supervisors.

The county is served by the Jefferson County Sheriff's Office, which is responsible for law enforcement and corrections. The county is also served by the Pennsylvania State Police.

The county is home to several state parks, including Clear Creek State Park, Cook Forest State Park, and Raccoon Creek State Park.

For the most up-to-date and in-depth information, please check the public records links below.