Bismarck is a rural unincorporated community and census-designated place (CDP) in Hot Spring County, Arkansas. It was first listed as a CDP in the 2020 census with a population of 229. It is located between Hot Springs and Caddo Valley, centered around the intersection of State Hwy 7 and State Hwy 84 in Hot Spring County, Arkansas, United States.
Public education is provided by the Bismarck School District, which provides elementary and secondary education.