United States Federal Census:
Federal census records are found at the Family History Library, the National Archives, and other federal and state archives. The "Census" section in the United States Research Outline provides more detailed information regarding these records.
The Family History Library has the United States federal censuses of Louisiana for 1810, 1820, 1830, 1840, 1850, 1860, 1870, 1880, 1900, 1910, 1920 and 1930. The 1890 census was destroyed, but there is a Union veterans schedule and a published index to it that is available at the Family History Library. The population schedule for the Ascension Parish 1890 census is at the Division of Archives, Records Management, and History, and an index has been published and is at the Family History Library.
Statewide indexes are available for the 1810, 1820, 1830, 1840, 1850, 1860, and 1870 censuses in book and microfiche format. Soundex (phonetic) indexes are available on microfilm for part of the 1880 and all of the 1900, 1910, 1920 and 1930 censuses.
Mortality schedules exist for 1850, 1860, 1870, and 1880, and all are indexed. The schedules and indexes are available at the Family History Library and the National Archives.
Federal Census websites:
Colonial and State:
In addition to the federal censuses, various military and local censuses were taken between 1699 and 1805. A special census of New Orleans was taken in 1805. The information in these censuses varies greatly. Several give the names and ages of all residents. Most of these censuses have been published and are available at the Family History Library. Two particularly helpful publications are:
Maduell,Charles R.,Jr. The Census Tables for the French Colony of Louisiana from 1699 Through 1732. Baltimore, Maryland: Genealogical Publishing Co., 1972. (FHL book 976.3 X2pm.)
Robichaux, Alberte J., Jr. Louisiana Census and Militia Lists 1770-1789. 2 vols. Harvey, Louisiana.: A. J. Robichaux, 1973 and 1974. (FHL book 976.3 X2pr fiche 6088510-511,vols. 1-2.)