The Grundy County Commission is the executive body of Grundy County.
Per authority given them by the Missouri Revised Statutes, the commission approves the annual county budget, appoints various county board members, approves all bills, payroll and any grants brought before them.
The County Commissioners oversee the Grundy County Bridge Department, which includes C.A.R.T. rock and the Grundy County Ambulance Department.

The County Commissioners are elected to four year terms.

The Presiding Commissioner is elected by voters of the entire county, while the associate commissioners are elected by the voters of their respective districts.

Phillip Ray, Presiding Commissioner
Don Sager, First District Commissioner
Brad Chumbley, Second District Commissioner

First District includes:
Jackson, Jefferson, Madison, Taylor & Wilson Townships plus the 1st & 4th Wards of the City of Trenton and Trenton Township

Second District includes:
Franklin, Harrison, Liberty, Lincoln, Marion, Myers & Washington Townships plus the 2nd & 3rd Wards of the City of Trenton and Trenton Township

Meetings are held every Tuesday from 8:30 a.m. to 4:30 p.m. unless otherwise notified.