Bolivar is a city and county seat of Polk County, Missouri, United States. Bolivar began as a settlement around Keeling Spring, with the majorit…Bolivar is a city and county seat of Polk County, Missouri, United States. Bolivar began as a settlement around Keeling Spring, with the majority of settlers being from Hardeman County, Tennessee. The settlement became part of Greene County, Missouri when that county was organized in 1833. After the northern part of Greene County was ceded to form Polk County, Missouri, the Polk County Court proclaimed the settlement as a city, named it Bolivar, and designated it as the county seat on 10 November 1835. Bolivar was re-organized as a fourth-class city on 15 February 1881.