General or National
Military Records – Links and directors through the National Archives
Military Records – Contact addresses for US military records
National Archives – Immigration page with selections, instructions, etc.
National Archives: Access to Archival Databases (AAD) – Direct links by category and type to online accessible collections
Orchard Lake Michigan Polish Mission – A collection of several archives with the focus on Polonia
Polish Museum of America (Chicago) – Substantial holdings of organizational and other records from American Polish communities

State and Local
Directory of State Archives and Records Programs – Contact information by state
Illinois Regional Archives Depository System – Important regional documents and records are held and serviced at seven universities