Concordia is a city in and the county seat of Cloud County, Kansas, United States. It is located along the Republican River in the Smoky Hills region of the Great Plains in North Central Kansas. As of the 2020 census, the population of the city was 5,111. Concordia is home of the Cloud County Community College and the Nazareth Convent and Academy.

The Republican River is a river in the central Great Plains of North America, rising in the High Plains of eastern Colorado and flowing east 453 miles (729 km) through the U.S. states of Nebraska and Kansas.