Oncsa Family History

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

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