Kalispell is a city in, and the county seat of Flathead County, Montana, United States. The 2015 Census estimates put Kalispell's population at 22,052. The Kalispell Micropolitan Statistical Area has a population of 93,068 and it 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 also the gateway to Glacier National Park.