Ohallahan Family History

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

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