Iowa Census online research should begin with what is available online for free. If this proves fruitful then congratulations! If not, then I would suggest signing up for the online census images (links to the right) where you can access all the available online Iowa census information directly from your computer at home.

1836 Wisconsin Territorial Census Records

Wisconsin Territorial Census: Includes the original counties of Dubuque and Demoines, which covered the area to become Iowa.

1838 Wisconsin Territorial Census Records

In 1838, Iowa was a still part of Wisconsin Territory when a census was taken prior to the splitting off of Iowa Territory from Wisconsin Territory. IAGenWeb has taken on the task of finding and transcribing these census records. See their introduction to the 1838 Wisconsin Territorial Census

1840 Iowa Census Records

1850 Iowa Census Records

1854 Iowa State Census Records

1856 Iowa State Census Records

1860 Iowa Census Records