Elkader is a city located in Clayton County, Iowa, in the United States. It serves as the county seat for Clayton County.
According to the 2020 census, the city had a population of 1,209 residents, which was a decrease from 1,465 in 2000. The location is notable for holding Iowa's lowest recorded minimum temperature, which was −44 °C (−47 °F) on February 3, 1996.