Oullahan Family History

You can see how Oullahan families moved over time by selecting different census years. The Oullahan family name was found in the USA, and Canada between 1880 and 1920. The most Oullahan families were found in USA in 1880. In 1880 there were 8 Oullahan families living in California. This was 100% of all the recorded Oullahan's in USA. California had the highest population of Oullahan families in 1880.

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