Population of Missouri

Analysis# Missouri Population Analysis Missouri's population of 6.21 million ranks it 19th nationally, with modest growth of 3.74% over the past decade—well below the U.S. average of approximately 7.4%. The state experienced its strongest expansion during the 2000s decade, but has since decelerated significantly, reflecting broader trends of migration to Sun Belt states and limited economic diversification outside major metros like St. Louis and Kansas City. At current growth rates, Missouri risks slipping further in national rankings as faster-growing states in the South and West expand their demographic and economic footprint.