During the 2010–11 school year, there were a total of 560 students attending classes in Unterseen. There were 4 kindergarten classes with a total of 81 students in the municipality. Of the kindergarten students, 22.2% were permanent or temporary residents of Switzerland (not citizens) and 24.7% have a different mother language than the classroom language. The municipality had 15 primary classes and 317 students. Of the primary students, 18.9% were permanent or temporary residents of Switzerland (not citizens) and 20.2% have a different mother language than the classroom language. During the same year, there were 8 lower secondary classes with a total of 162 students. There were 18.5% who were permanent or temporary residents of Switzerland (not citizens) and 18.5% have a different mother language than the classroom language.