Bouton is a city in Dallas County, Iowa, United States. The population was 127 at the 2020 census. It is part of the Des Moines–West Des Moin…Bouton is a city in Dallas County, Iowa, United States. The population was 127 at the 2020 census. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area. According to the United States Census Bureau, the city has a total area of 0.14 square miles, all land.