Series: M593   Rolls: 1 - 1748 Most of the state of Minnesota is available as: Series: T132   Rolls: 1 - 13. 1870 Facts 1. Ninth U.S. decennial population census. 2. U.S. population: 38.6 million 3. Census conducted by U.S. marshals under the     direction of the Census Office appointed by the     U.S. Secretary of the Interior. 4. Census day: 1 June 1870. 5. Mandated copies: Three sets, one to the county court,     a second to the secretary of the state (or the territory)     and the last to the U.S. Secretary of the Interior.