Koslak Family History

You can see how Koslak families moved over time by selecting different census years. The Koslak family name was found in the USA, and Canada between 1911 and 1920. The most Koslak families were found in USA in 1920. In 1920 there was 1 Koslak family living in Illinois. This was about 25% of all the recorded Koslak's in USA. Illinois and 3 other states had the highest population of Koslak families in 1920.

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