Waldenburg is a town in Poinsett County, Arkansas, United States. The population was 80 at the 2000 census. It is included in the Jonesboro, Arkansas Metropolitan Statistical Area.
Waldenburg is located at 35°33′58″N 90°56′2″W / 35.56611°N 90.93389°W / 35.56611; -90.93389 (35.565984, -90.933779).
According to the United States Census Bureau, the town has a total area of 0.1 square miles (0.4 km²), all land.