Bloomfield is a city in Stoddard County, Missouri, United States. The population was 1,755 at the 2020 census. It is the county seat of Sto…Bloomfield is a city in Stoddard County, Missouri, United States. The population was 1,755 at the 2020 census. It is the county seat of Stoddard County. In September 1864 during the Civil War, the town was reduced to ashes.