Irwin, Missouri

Irwin is an unincorporated community and census-designated place in northern Barton County, Missouri, United States. As of the 2020 census it had a population of 47.

History
Irwin was platted in 1884. The community has the name of the Irwin family of settlers. A post office called Irwin was established in 1884, and remained in operation until 1981.

Geography
Irwin is located halfway between Lamar and Sheldon on U.S. Route 71 (Interstate 49).

According to the United States Census Bureau, the CDP has a total area of 0.78 sqkm, of which 0.02 sqkm, or 2.00%, is water.