Lakeside is an inactive city in Miller County, Missouri, United States, located along the Osage River near the Bagnell Dam.

[5] The city had developed at the time of construction of the Bagnell Dam and power plant, and many workers lived here.

Few people were needed as residents to administer the complex, but the Union Electric Administration Building-Lakeside was built in association with the dam project.

[6][7] Lakeside is located in western Miller County, adjacent to Bagnell Dam.

It is bordered to the north, west, and south by the city of Lake Ozark.