| Office | Candidates |
|---|
| No contested local or district races found for Mercer County. Every race listed below has one candidate per seat. |
- Mercer County Board District 1: Rebecca S. Hawn (R)
- Mercer County Board District 1 (Special): Todd E. Line (R)
- Mercer County Board District 3: Timothy P. Arbet (R)
- Mercer County Board District 4: Joshua Frieden (R)
- Mercer County Board District 5: Steve Moreland (R)
- Mercer County Clerk and Recorder: Brian R. Gerber (R)
- Mercer County Sheriff: Casey Switzer (R)
- Mercer County Treasurer: Bev Lower (R)
- 14th Judicial Circuit judge, Rock Island County (vacancy of Linnea Thompson): Tionn Fambro Carter (D)
- Regional Office of Education 33 Regional Superintendent: Kathryn Jennings (R)
14th Judicial Circuit, circuit-wide
John L. McGehee, Peter W. Church, Terence M. Patton