O'callghan Family History

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

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