 The age distribution of the population () is children and teenagers (0–19 years old) make up 28.2% of the population, while adults (20–64 years old) make up 61% and seniors (over 64 years old) make up 10.9%.In Knonau about 81.8% of the population (between age 25-64) have completed either non-mandatory upper secondary education or additional higher education (either university or a "Fachhochschule").Knonau has an unemployment rate of 2.21%.