 In Widnau about 70.4% 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 Widnau, , the highest education level completed by 1,528 people (20.5% of the population) was Primary, while 2,736 (36.6%) have completed their secondary education, 786 (10.5%) have attended a Tertiary school, and 314 (4.2%) are not in school.The remainder did not answer this question.