You can see how Theiler families moved over time by selecting different census years. The Theiler family name was found in the USA, the UK, and Scotland between 1880 and 1920. The most Theiler families were found in USA in 1920. In 1880 there were 14 Theiler families living in Illinois. This was about 32% of all the recorded Theiler's in USA. Illinois had the highest population of Theiler families in 1880.

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