The city was named after Warsaw, the capital city of Poland, in honor of the Revolutionary War hero Tadeusz Kościuszko, who was Polish and had also fought for independence in his homeland.

Warsaw was a steamboat port, the furthest point up the Osage River they could navigate.

[6] Permanent immigrants to the area were Germans, Scotch-Irish, and English, as well as transplant farmers from Kentucky, Tennessee and the Carolinas, first arriving circa 1820.

The dam for Truman Reservoir on the Osage River just northwest of the city limits officially opened 1979 after construction began in 1964.

Place names for many lake related businesses including the Harry S. Truman Regional Visitor Center have the Warsaw mailing address even though they are outside the city limits.

The Warsaw city limits do not include Truman Reservoir lakefront.

City limits do include waterfront the upper reaches of the Osage Arm of the Lake of the Ozarks.

[7] The Upper Bridge was listed on the National Register of Historic Places in 1999.

[10] The total area is 7.6% water given its southern border the upper reaches of Lake of the Ozarks.

37.7% of all households were made up of individuals, and 21% had someone living alone who was 65 years of age or older.

38.6% of all households were made up of individuals, and 21.5% had someone living alone who was 65 years of age or older.