O'callaghen Family History

You can see how O'callaghen families moved over time by selecting different census years. The O'callaghen family name was found in the USA between 1880 and 1920. The most O'callaghen families were found in USA in 1880. In 1880 there were 4 O'callaghen families living in Illinois. This was about 50% of all the recorded O'callaghen's in USA. Illinois and 1 other state had the highest population of O'callaghen families in 1880.

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