Missouri is a unisex given name of American origin, derived from the Missouri River, which was named after the Missouri Indians who lived along its banks. The name Missouri is often associated with the state of Missouri in the United States, which takes its name from the river. It is also the name of several other places and things throughout North America, including a county in Kansas and a town in Oklahoma.
The name Missouri has seen a significant decline in popularity over the past century, with only 6 births recorded in the most recent year available (2023). The peak years for this name were around the turn of the 20th century, with the highest number of births occurring in 1917 and 1921, both with 38 births. However, since the 1950s, the popularity of the name has dramatically decreased, with less than 10 births recorded per year on average from 1950 onwards.