 494 people or 23.3% are 20–39 years old, and 812 people or 38.3% are 40–64 years old.The senior population distribution is 225 people or 10.6% are 65–79 years old, 40 or 1.9% are 80–89 years old and 5 people or 0.2% of the population are 90+ years old.In Udligenswil about 79.1% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a "Fachhochschule").