West Okoboji Lake (sometimes known as West Lake Okoboji) is a natural body of water, approximately 3,847 acres (15.57 km2) in area, in Dickinson County in northwestern Iowa in the United States.

Okoboji was derived from the Dakota name for the lake, and Wahpeton was the name of one of the major historic Sioux bands in the nineteenth century.

[3] The statement that West Okoboji is "one of only three blue water lakes in the world" is a long-repeated myth,[1] which has been refuted.

[8] The depth of the lake makes it a popular regional destination for motor boating, water skiing, sailing, and swimming.

The main catches in the lake are yellow perch, bluegill, and walleye.