United States

• Castle Garden
• Digital State Archives
• Federal Land Records
• Library of Congress
• National Archives

Michigan

• Archives of Michigan
• Detroit Catholic Churches
• MDCH Genealogical Death Indexing System, 1867-1897
• Seeking Michigan

Minnesota

• Minnesota Historical Society
• Minnesota Official Marriage System

New Jersey

• Sanborn Digital Fire Insurance Maps of New Jersey

New York

• Northern New York Historical Newspapers

North Dakota

• North Dakota State University Databases & Indexes
• North Dakota Vital Records

Washington

• Washington State Digital Archives