Albert Sidney Johnson Carnahan was an American educator, diplomat and Democratic Party politician who represented southeastern Missouri in the United States House of Representatives for fourteen years between 1945 and 1961. He was the patriarch of the Carnahan family, a prominent political family in Missouri into the 21st century. He began his career as a teacher and school administrator.

Ellsinore is a town in Carter County, Missouri, United States. The 2020 U.S. Census showed Ellsinore with a population of 416.