Darmstadt is a census-designated place in St. Clair County, Illinois, United States. As of the 2020 census, Darmstadt had a population of 49.
History
Darmstadt was laid out in 1855. The community was named after Darmstadt, in Germany. A post office called Darmstadt was established in 1864, and remained in operation until it was discontinued in 1907.