Müllheim is home to the Müllheim primary school district. It is also home to the Müllheim secondary school district. In the primary school district there are 256 students. There are 55 children in the kindergarten, and the average class size is 18.33 kindergartners. Of the children in kindergarten, 26 or 47.3% are female, 9 or 16.4% are not Swiss citizens and 8 or 14.5% do not speak German natively. The lower and upper primary levels begin at about age 5-6 and lasts for 6 years. There are 101 children in who are at the lower primary level and 100 children in the upper primary level. The average class size in the primary school is 20.67 students. At the lower primary level, there are 43 children or 42.6% of the total population who are female, 16 or 15.8% are not Swiss citizens and 15 or 14.9% do not speak German natively. In the upper primary level, there are 56 or 56.0% who are female, 9 or 9.0% are not Swiss citizens and 10 or 10.0% do not speak German natively.