Olallaghan Family History

You can see how Olallaghan families moved over time by selecting different census years. The Olallaghan family name was found in the USA in 1880. In 1880 there was 1 Olallaghan family living in New Jersey. This was 100% of all the recorded Olallaghan's in USA. New Jersey had the highest population of Olallaghan families in 1880.

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