Tutt Library Research Guides
– compilation of federal and state statistical sources from the University of Colorado at Boulder.
1900 Census data for Colorado - by county or zip code
Colorado Census Records |Census Finder - 1860 forward
A Century of the Colorado Census, 1860 – 1970.
Ref. HA 272.C39 1976
The Colorado Census, the Second Century, 1980.
Ref. HA 272.C39 1984
See volumes for the state of Colorado in government documents Census stacks.