Familysearch.org or kitty's Library page has lots to search http://www.wikitree.com/wiki/Space:Kitty%27s_Library .
John Vickery's suggestion is spot on ! ..
http://www.wikitree.com/wiki/Space:Kitty%27s_Library
Is Super !
C'est Bon Magnifique
As it happens, FindMyPast, which is mostly a pay site, recently made all their US Census records free for all:
https://blog.findmypast.com/search-guide-us-census-1842353662.html
Greg