Mercer County is located in the western part of Pennsylvania and is part of the Pittsburgh metropolitan area. The county seat is Mercer.

The county is governed by a three-member Board of Commissioners, who are elected every four years.

The county is served by the Mercer County Sheriff's Office, which is responsible for law enforcement and corrections. The office is headed by the Sheriff, who is elected every four years. The office also includes a number of divisions, including the Patrol Division, the Criminal Investigation Division, and the Corrections Division.

The county is served by the Mercer County Emergency Management Agency, which is responsible for coordinating emergency response and recovery efforts in the event of a disaster. The agency is headed by the Emergency Management Coordinator, who is appointed by the Board of Commissioners.

The county is served by the Mercer County Health Department, which is responsible for protecting and promoting the health of county residents. The department is headed by the Health Director, who is appointed by the Board of Commissioners. The department also includes a number of divisions, including the Environmental Health Division, the Public Health Division, and the Mental Health Division.

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