 285 (or about 6.49% of the population) belonged to no church, are agnostic or atheist, and 222 individuals (or about 5.06% of the population) did not answer the question.In Châtel-Saint-Denis about 1,390 or (31.7%) of the population have completed non-mandatory upper secondary education, and 437 or (10.0%) have completed additional higher education (either university or a "Fachhochschule").Of the 437 who completed tertiary schooling, 59.3% were Swiss men, 22.9% were Swiss women, 10.5% were non-Swiss men and 7.3% were non-Swiss women.