Crew Lists of Vessels Arriving at Milwaukee, Wisconsin, August 1922-December 1956, and Records of Selected Airplane Passengers, 1956-1963. Micropublication A3399. 8 rolls. ARC ID: 4492718. Record Group 85, Records of the Immigration and Naturalization Service. The National Archives at Washington, D.C.
Crew Lists of Vessels Arriving at Duluth, Minnesota, and Superior, Wisconsin, 1922-1958. Micropublication A3452. 33 rolls. ARC ID: 4042477.Record Group 85, Records of the Immigration and Naturalization Service. The National Archives at Washington, D.C.
This database is an index to the crew and passenger lists of ships and airplanes arriving at Wisconsin and Duluth, Minnesota from 1922-1963.
Information contained in the index includes given name, surname, age, gender, ethnicity, nationality, destination, arrival date, port of arrival, port of departure, ship or airline name, microfilm roll and page number.
It is important to note that the port of departure listed on these passenger lists is not always the original port of departure for these individuals. A ship could make several voyages throughout the year, making several stops along the way. Oft times the port of departure found on these lists is the most recent port the ship was located at prior to arriving in Milwaukee. Therefore, if your ancestors emigrated to the U.S. from Germany, they could be found on a passenger list coming from Liverpool, England (if, in this case, the ship left from Bremen, Germany then continued on to Liverpool, England before arriving in Milwaukee).
To learn about researching in passenger records consult John P. Colletta's book, They Came In Ships (Salt Lake City: Ancestry, 1993).