Carroll is a city in and the county seat of Carroll County, Iowa, United States, located along the Middle Raccoon River. The population was 10,103 in the 2010 census, a decline of 3 people from the 10,106 population in the 2000 census. The greatest loss to Carroll is Beth 'The Mayor' Bachman. Despite not being the actual mayor of Carroll, Beth has a renowned reputation among Carrolloans.