Ontlon Family History

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

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