Ida Grove is a city in Ida County, Iowa, United States. The population was 2,051 at the time of the 2020 census. It is the county seat of Ida County.

Ida County is a county located in the U.S. state of Iowa. As of the 2020 census the population was 7,005, making it the state's eighth-least populous county. The county seat is Ida Grove. The county was authorized by the Iowa Legislature in January 1851 as a packet of projected counties in unorganized territory of western Iowa. It was named after Ida Smith, the first child of European immigrants to be born in this region.