Cass County, Missouri local election authority: address and phone for 2026
The Missouri Secretary of State lists Cass County's local election authority as the County Clerk at 102 E Wall St, Harrisonville, MO 64701, phone 816-380-8102. Missouri: No-excuse early voting opens Tuesday, October 20; early voting ends Monday, November 2. Ask this office for its early voting locations and hours.
Cass County local election authority
Cass County Clerk
Office: 102 E Wall St, Harrisonville, MO 64701
Phone: 816-380-8102
Website: casscounty.com
Check your registration and find your polling place at the Secretary of State's voter lookup, the state's voter site.
Missouri voting dates for Cass County voters
| Date | What |
|---|---|
| Wed, Oct 7, 5:00 PM | Last day to register Last day to register for the Nov 3 election: online, in person at your local election authority, or by mail with a form postmarked by Oct 7. Missouri law (RSMo 115.135) sets the cutoff at 5:00 p.m., or your election office's normal closing time if that is later. source |
| Tue, Oct 20 | No-excuse early voting opens From Oct 20, any registered voter can vote absentee in person without giving a reason, at a location chosen by the local election authority. Bring a photo ID. Voters with a qualifying reason could start Sept 22. Hours vary by election office. source |
| Wed, Oct 21, 5:00 PM | Request an absentee ballot by mail A mailed or faxed request must reach your local election authority by 5:00 p.m. on Oct 21. Missouri requires a qualifying reason to vote absentee by mail. You can still vote absentee in person through Nov 2. source |
| Mon, Nov 2, 5:00 PM | Early voting ends Last day to vote absentee in person at your local election authority's office. Voting ends at 5:00 p.m. source |
| Tue, Nov 3, 7:00 PM | Return your absentee ballot Your local election authority must receive your absentee ballot by the time the polls close at 7:00 p.m. on Election Day. A postmark is not enough. source |
| Tue, Nov 3, 7:00 PM | Election Day: polls open 6:00 a.m. to 7:00 p.m. If you are in line at 7:00 p.m., you can still vote. Bring an accepted photo ID. Find your polling place with the Secretary of State's voter lookup. source |
Cass County voting questions
What is the phone number for the Cass County local election authority?
816-380-8102, the County Clerk (Cass County's local election authority on the Missouri Secretary of State, Local Election Authorities list).
What is the address of the Cass County local election authority?
102 E Wall St, Harrisonville, MO 64701.
When does early voting start in Cass County?
No-excuse early voting opens Tuesday, October 20; early voting ends Monday, November 2, 2026. From Oct 20, any registered voter can vote absentee in person without giving a reason, at a location chosen by the local election authority. Bring a photo ID. Voters with a qualifying reason could start Sept 22. Hours vary by election office.
More for Missouri voters
- Who is on the Missouri ballot: every candidate on the state's official list, race by race.
- Missouri voting deadlines 2026: registration, mail ballots, early voting and Election Day.
- Every Missouri county's office.
- Early voting dates in every state.
Other Missouri counties: Adair, Andrew, Atchison, Audrain, Barry, Barton, Bates, Benton, Bollinger, Boone, Buchanan, Butler, Caldwell, Callaway, Camden, Cape Girardeau, Carroll, Carter, Cedar, Chariton, Christian, Clark, Clay, Clinton, Cole, Cooper, Crawford, Dade, Dallas, Daviess, DeKalb, Dent, Douglas, Dunklin, Franklin, Gasconade, Gentry, Greene, Grundy, Harrison, Henry, Hickory, Holt, Howard, Howell, Iron, Jackson, Jasper, Jefferson, Johnson, Kansas City, Knox, Laclede, Lafayette, Lawrence, Lewis, Lincoln, Linn, Livingston, Macon, Madison, Maries, Marion, McDonald, Mercer, Miller, Mississippi, Moniteau, Monroe, Montgomery, Morgan, New Madrid, Newton, Nodaway, Oregon, Osage, Ozark, Pemiscot, Perry, Pettis, Phelps, Pike, Platte, Polk, Pulaski, Putnam, Ralls, Randolph, Ray, Reynolds, Ripley, Saline, Schuyler, Scotland, Scott, Shannon, Shelby, St. Charles, St. Clair, St. Francois, St. Louis, City of St. Louis, Ste. Genevieve, Stoddard, Stone, Sullivan, Taney, Texas, Vernon, Warren, Washington, Wayne, Webster, Worth, Wright.
Office details are from the Missouri Secretary of State, Local Election Authorities (checked October 14, 2026). Dates are Missouri's, each linked to its source. Call the office before you go.