One place to try are the Ellis Island records. It's a free search... http://www.ellisisland.org/ David >I am asking this for a friend in England- how and where would one > find records of people who immigrated to the US and (probably) became > citizens, around 1900? I am sure there are federal records, but I > have no idea where they would be or who to contact to get information. > > thanks, > > Nancy