Mercer County Community Development
- Attracts and retains businesses with the help of many good state and local programs. Also presents an overview of the county.
- http://www.mercercountyed.com/

Franklin Township
- Official site provides information on the town and area businesses and services.
- http://www.franklintownship-mercercounty.org/

Mercer County Sheriff's Office
- Provides profile of department, personnel, and history.
- http://www.mercercounty.org/sheriff/

Mercer County Connections
- Includes county profile and services, educational and government websites, parks and recreation, health facilities, and places to visit.
- http://www.oplin.org/controller.php?l=category&Id=63-16-167

Mercer County Extension Office
- Branch office of Ohio State University, it combines the needs of local citizens and communities, with new research and technical information.
- http://mercer.osu.edu/

Profile for Mercer County
- Information on the political infrastructure of the county.
- http://www.capitolimpact.com/gw/cntydetail.asp?state=oh&stfips=39&stname=Ohio&fips=39107

Mercer County District Library
- Located in Celina with branches located in Mendon, Chickasaw, and St. Henry. Provides an online database, branch details, hours, special holdings, and programs offered.
- http://www.mercer.lib.oh.us/

Mercer County Fair
- Includes schedule and information about the fair and other events held on the fairgrounds in Celina.
- http://www.mercercountyohiofair.com/

Mercer County, Ohio - U.S. Census Bureau
- Provides population, demographic, and housing information.
- http://quickfacts.census.gov/qfd/states/39/39107.html

Mercer County Educational Service Center
- Provide services which assist in providing a quality education for Pre-K to 12th grade students.
- http://www.noacsc.org/mercer/mc/

Ohio: Auglaize & Mercer Counties
- Provides an editorial survey of economic development opportunities in the counties.
- http://www.conway.com/oh/9708/auglaize.htm

Mercer County - Board of Elections
- Posts live and previous election results. Also provides the election calendar and information about the board, issues, candidates, and absentee ballot application.
- http://www.mercercountyohio.org/elections/

County Map
- Map of Mercer County.
- http://www.dot.state.oh.us/map1/ohiomap/images/county/mercer.gif

Celina - Mercer Chamber of Commerce
- Presents calendar of events, officer and trustee directory, education, and business information.
- http://www.celinamercer.com/

Mercer County
- Site provides information on all county offices and departments.
- http://www.mercercountyohio.org/

The Political Graveyard: Mercer County, Ohio
- Site contains information on the political history of Mercer County, cemeteries and memorial sites in the county.
- http://politicalgraveyard.com/geo/OH/MC.html