American FactFinder: Your source for population, housing, economic, and geographic information
Census Questions: Summary of what census questions were asked in what years
Indiana State Library Census Records: Resources provided by the Indiana State Library
Census Historical Data by County State: Gives all questions asked historical data for 1790-1960 by county and state
Wabash Carnegie Public Library has available the US Census for Wabash County and other counties in Indiana and Kentucky on microfilm and print.