Flathead County, Montana

Flathead County
Flathead County Courthouse in Kalispell
Location within the U.S. state of Montana
Montana's location within the U.S.
Coordinates: 48°17′N 114°01′W / 48.29°N 114.02°W / 48.29; -114.02
Country United States
State Montana
Founded1893
Named afterFlathead Indians
SeatKalispell
Largest cityKalispell
Area
  Total
5,256 sq mi (13,610 km2)
  Land5,088 sq mi (13,180 km2)
  Water169 sq mi (440 km2)  3.2%
Population
 (2020)
  Total
104,357
  Estimate 
(2024)
114,527
  Density20/sq mi (7.7/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional district1st
Websiteflathead.mt.gov
  • Montana county number 07

Flathead County is a county located in the U.S. state of Montana. At the 2020 census, its population was 104,357, making it the state's fourth most populous county. Its county seat is Kalispell. Its numerical designation (used in the issuance of license plates) is 7. Its northern border is on the state's north border, making it contiguous with the Canada–US border, facing British Columbia.

Flathead County comprises the Kalispell, Montana Micropolitan Statistical Area, with neighboring Lake County following soon after.