The following table lists offices and candidates seeking nomination and election in 2018 for the three major parties. If you’re interested in running for one of these offices, start your candidacy now.
This list should not be construed as the most accurate listing. The Marion County Election Board certifies candidate filings in Marion County.
| Office | Republican | Democrat | Libertarian |
| US Senate | Luke Messer, Todd Rokita | Joe Donnelly | |
| Congress – Dist. 5 | Susan Brooks | Dion Douglas, Sean Dugdale, Eshel Faraggi, Kyle Moore, Dee Thornton | |
| Congress – Dist. 7 | John Couch, J Davis, Don Eason, JD Miniear, Wayne Harmon, Tony Pely | Andre Carson | |
| IN Auditor | Tera Klutz | ||
| IN SOS | Connie Lawson | Jim Harper | |
| IN Treasurer | Kelly Mitchell | ||
| IN Rep – Dist. 86 | Ed Delaney | ||
| IN Rep – Dist. 87 | Carey Hamilton | Paula Finch | |
| IN Rep – Dist. 88 | Poonam Gill | Brian Bosma | |
| IN Rep – Dist. 89 | Cindy Kirchhofer | John Barnes | |
| IN Rep – Dist. 90 | Tim Jeffers | Mike Speedy | |
| IN Rep – Dist. 91 | Kevin Leineweber | Robert Behning | |
| IN Rep – Dist. 92 | Karlee Macer | ||
| IN Rep – Dist. 93 | Greg Rathnow | David Frizzell | |
| IN Rep – Dist. 94 | Cherrish Pryor | ||
| IN Rep – Dist. 95 | John Bartlett | ||
| IN Rep – Dist. 96 | Greg Porter | ||
| IN Rep – Dist. 97 | Justin Moed | ||
| IN Rep – Dist. 98 | Robin Shackleford, Nicole Thomas | ||
| IN Rep – Dist. 99 | Vaness Summers | ||
| IN Rep – Dist. 100 | Dan Forestal | ||
| Prosecutor | Terry Curry | Ben Strahm | |
| Clerk | Myla Eldridge | Kyle Leffel | |
| Auditor | Julie Voorhies | Caarn Singh Heir | |
| Sheriff | Kerry Forestal, William Benjamin | Thomas Vaughn, Jim Grimes, Brian Durham | |
| Assessor | Joseph O’Connor | ||
| Recorder | Kate Bell | Paul Annee | |
| Small Claims – Center | Brenda roper | ||
| Small Claims – Decatur | Myron Hockman | ||
| Small Claims – Franklin | John Kitley | ||
| Small Claims – Lawrence | Kimberly Bacon | David Seiter | |
| Small Claims – Perry | Cheryl Rivera, Joseph Schaefer | ||
| Small Claims – Pike | Doug Stephens | ||
| Small Claims – Warren | Garland Graves | Susan Smith | |
| Small Claims – Washington | Steve Poore | ||
| Small Claims – Wayne | Gerald Coleman | Bob Lutz | |
| Beech Grove Sch. Board (x3) | |||
| Decatur Twp. Sch. Board – Dist. 1 | |||
| Decatur Twp. Sch. Board – Dist. 3 | |||
| Franklin Twp. Sch. Board – Dist. 1 | |||
| Franklin Twp. Sch. Board – Dist. 3 | |||
| Franlin Twp. Sch. Board At-Large | |||
| IPS At-Large | |||
| IPS – Dist. 1 | |||
| IPS – Dist. 3 | |||
| IPS – Dist. 5 | |||
| Lawrence Twp. Sch. Board At-Large | |||
| Lawrence Twp. Sch. Board – Dist. 2 | |||
| Perry Twp. Sch. Board At-Large (x3) | |||
| Pike Twp. Sch. Board At-Large (x3) | |||
| Warren Twp. Sch. Board At-Large (x3) | |||
| Wayne Twp. Sch. Board At-Large (x4) |