Copies of the 1840 census lists are available on 35 millimeter microfilm from: Census Microfilm Expeditors or the National Archives.   Series: M704 Rolls: 1 - 580.

1840 Facts

    1. Sixth U.S. decennial population census.
    2. U.S. population: 17.1 million
        (14.6 million free, 2.5 million slave)
    3. Census conducted by U.S. marshals under the
        direction of the Secretary of State.
    4. Census day: 1 June 1840.
    5. Mandated copies: Two sets, one sent to the federal
        district court, the other to the Secretary of State.