Oallahan Family History

You can see how Oallahan families moved over time by selecting different census years. The Oallahan family name was found in the USA in 1920. In 1920 there was 1 Oallahan family living in Iowa. This was about 33% of all the recorded Oallahan's in USA. Iowa and 2 other states had the highest population of Oallahan families in 1920.

Use census records and voter lists to see where families with the Oallahan surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.