Kalispell is a city in Montana and the county seat of Flathead County, Montana, United States. The 2020 census put Kalispell's population at 24,558. In Montana's northwest region, it is the largest city and the commercial center of the Kalispell Micropolitan Statistical Area. The name Kalispell is a Salish word meaning "flat land above the lake".

Flathead County is 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 is 7. Its northern border is on the state's north border, making it contiguous with the Canada–US border, facing British Columbia.