Kalispell is a city in and the county seat of Flathead County, Montana, United States. Kalispell is the largest city and commercial center of Northwest Montana. The name Kalispell is a Salish word meaning flat land above the lake. Kalispell is the principal city of the Kalispell Micropolitan Statistical Area the largest Micropolitan Statistical Area in Montana and the third largest of all of the Montana census statistical areas. Kalispell is also the gateway to Glacier National Park.