Österman is a Swedish-language surname.
As of 2014, 56.5% of all known bearers of the surname Österman were residents of Sweden (frequency 1:8,310), 39.9% of Finland (1:6,567) and 2.4% of Estonia (1:26,433).
In Sweden, the frequency of the surname was higher than national average (1:8,310) in the following counties:
In Finland, the frequency of the surname was higher than national average (1:6,567) in the following regions:[1]