Grundy County, Missouri

Grundy County
Grundy County Courthouse in Trenton
Location within the U.S. state of Missouri
Missouri's location within the U.S.
Coordinates: 40°07′N 93°34′W / 40.11°N 93.57°W / 40.11; -93.57
Country United States
State Missouri
FoundedJanuary 2, 1841
Named afterFelix Grundy
SeatTrenton
Largest cityTrenton
Area
  Total
438 sq mi (1,130 km2)
  Land435 sq mi (1,130 km2)
  Water2.8 sq mi (7 km2)  0.6%
Population
 (2020)
  Total
9,808
  Estimate 
(2024)
9,766
  Density22.4/sq mi (8.6/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district6th
Websitewww.grundycountymo.com

Grundy County is a county located in the U.S. state of Missouri. As of the 2020 census, the population was 9,808. Its county seat is Trenton. The county was organized January 2, 1841, from part of Livingston County, Missouri and named after U.S. Attorney General Felix Grundy.