O'sullivan Family History

You can see how O'sullivan families moved over time by selecting different census years. The O'sullivan family name was found in the USA, the UK, Canada, and Scotland between 1861 and 1920. The most O'sullivan families were found in USA in 1880. In 1891 there were 8 O'sullivan families living in London. This was 100% of all the recorded O'sullivan's in United Kingdom. London had the highest population of O'sullivan families in 1891.

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