Census and immigration records often show the short label “Posen” as the place of origin for German, Jewish and Polish immigrants. The Poznan Marriage Indexing Project helps descendants of those who left the Poznan area in the 19th century to identify the actual town or parish their ancestors left when departing for America, Australia or elsewhere. The period between 1835-1884 corresponds to the period of greatest emigration.
The database is located at:
http://bindweed.man.poznan.pl/posen/search.php

Text also available in: German