You can see how Dalthrop families moved over time by selecting different census years. The Dalthrop family name was found in the USA in 1920. In 1920 there were 2 Dalthrop families living in Montana. This was 100% of all the recorded Dalthrop's in USA. Montana had the highest population of Dalthrop families in 1920.

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