Koslowskus Family History

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

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