This web guide, compiled by Judith P. Reid, has been prepared primarily as an aid for those who are researching Irish genealogy and local history at the Library of Congress, but it will also be useful for those searching in other large libraries. It is not comprehensive and is intended to be supplemented by P. William Filby's American & British Genealogy & Heraldry: A Selected List of Books (Z5311.F55 1983). Note especially, sections on: Land, Property, and Other Records; Maps, Atlases & Gazetteers; Names: Geographical.
This site allows you to search and view millions of historic American newspaper pages from 1789-1949. Search this collection to find newspaper articles that reference Irish Americans from this time period. Sample search: Irish immigrants