O'brien Family History

You can see how O'brien families moved over time by selecting different census years. The O'brien family name was found in the USA, the UK, Canada, and Scotland between 1841 and 1920. The most O'brien families were found in USA in 1880. In 1911 there were 59 O'brien families living in Ontario. This was about 60% of all the recorded O'brien's in Canada. Ontario had the highest population of O'brien families in 1911.

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