Lähteenmäki is a Finnish surname.
As of 2014, 96.6% of all known bearers of the surname Lähteenmäki were residents of Finland (frequency 1:1,649), 1.9% of Estonia (1:20,333) and 1.3% of Sweden (1:218,817).
In Finland, the frequency of the surname was higher than national average (1:1,649) in the following regions:[1]