Grönblom is a Swedish-language surname, most commonly occurring in Finland.
As of 2014, 90.9% of all known bearers of the surname Grönblom were residents of Finland (frequency 1:36,645) and 8.5% of Sweden (1:703,340).
In Finland, the frequency of the surname was higher than national average (1:36,645) in the following regions:[1]