According to the Kansas Secretary of State, you must drop your ballot off at your county election officer office before it closes on election day. Details on the location, operating hours, email address, and phone number for the election officer office in Linn County is as follows:
- 315 Main St., PO Box 350, Mound City, KS 66056 (source)
- 8:00-4:00
- Email: dlamb@linncountyks.com
- Phone: (913)795-2668