Salmelainen is a Finnish surname.
As of 2014, 94.5% of all known bearers of the surname Salmelainen were residents of Finland (frequency 1:24,760), 2.1% of Sweden (1:1,969,352) and 2.1% of Australia (1:4,754,775).
In Finland, the frequency of the surname was higher than national average (1:24,760) in the following regions:[1]