Minburn is a city in Dallas County, Iowa, United States. The population was 325 at the time of the 2020 census. This city is another one of th…Minburn is a city in Dallas County, Iowa, United States. The population was 325 at the time of the 2020 census. This city is another one of those Dallas County cities that is part of the Des Moines–West Des Moines Metropolitan Statistical Area.