 In Flawil about 64.7% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a "Fachhochschule").Out of the total population in Flawil, , the highest education level completed by 2,070 people (22.2% of the population) was Primary, while 3,308 (35.5%) have completed Secondary, 854 (9.2%) have attended a Tertiary school, and 520 (5.6%) are not in school.The remainder did not answer this question.