Diehlstadt is a village in Scott County, Missouri, United States.

[5] The original plat of Dielstadt filed on June 15, 1870, consisted of 40 acres.

Deal (also spelled Diehl), a German merchant, with the German-language suffix "stadt" meaning town.

[7] A post office called Diehlstadt was established in 1870, and remained in operation until 1977.

[9] According to the United States Census Bureau, the village has a total area of 0.07 square miles (0.18 km2), all land.

8.9% of all households were made up of individuals, and 3.6% had someone living alone who was 65 years of age or older.

19.7% of all households were made up of individuals, and 11.5% had someone living alone who was 65 years of age or older.