Kostkowski Family History

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

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