The US Federal Census United States Postal Service Find that zip-code that you need. Just put in the state you want and it will give you the address of where to send for those records you need. He was born in Hungary and now lives in San Francisco. Then check out this page, it will help with that. AllCensus CD-ROMs with images of the federal census pages from 1790 to 1920 segregated by year, state, and county.
Unregistered version is Free.
If there are unfamiliar genealogy words that surface during your research this site probably will be of some help to you. Dictionaries On-Line Other languages and different subject areas found here. If you have a genealogy question ask The Genealogy Lady. What some of those occupations from the 18th and 19th century really meant. If you're not exactly sure where a place is located within a certain state or country then check out this site.