O'sullivern Family History

You can see how O'sullivern families moved over time by selecting different census years. The O'sullivern family name was found in the USA in 1920. In 1920 there was 1 O'sullivern family living in New York. This was 100% of all the recorded O'sullivern's in USA. New York had the highest population of O'sullivern families in 1920.

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