From 1892 to 1924, more than 22 million immigrants, passengers, and crew members came through Ellis Island and the Port of New York. The ship companies that transported these passengers kept detailed passenger lists, called "ship manifests." Now, thanks to the generous efforts of volunteers of The Church of Jesus Christ of Latter-day Saints, these manifests have been transcribed into a vast electronic archive, which you can easily search to find an individual passenger.
During the 20th century more than seven million people made Australia home. The National Archives project Making Australia Home is progressively making migration records available online.