Lakeside is an unincorporated area and census-designated place (CDP) in Flathead County, Montana, United States.

[4] West Shore State Park is 5 miles south of town.

It is bordered to the north by Somers, and it extends south as far as the Lake County line.

U.S. Route 93 passes through Lakeside, leading north 14 miles (23 km) to Kalispell and south 37 miles (60 km) to Polson at the south end of Flathead Lake.

15.6% were of English, 15.3% German, 14.8% Norwegian, 8.2% United States or American, 7.3% Irish and 5.5% Italian ancestry according to Census 2000.

22.7% of all households were made up of individuals, and 9.6% had someone living alone who was 65 years of age or older.