There are several sources of US Census data on CD-ROMs.  A good place to
begin looking is any one of many genealogy sites on the web.  Most of these
sites have links or stores where you can purchase various genealogical
references, including the census.  Some of the sites also allow you to read
these records on the web site if you are a member.

Independent of the genealogy sites are private companies who will custom
prepare a census CD for you -- these firms can be located on-line via an
internet search.  Of the census data I've seen, 1880, 1890, 1900, and 1910
are available for most states and many of the counties within the states.
Costs are variable.

Lee Bennett
Bennett Management Services LLC
Monticello, Utah
435-587-2556 phone & fax