Milliken has 2 primary and secondary schools. One of the best schools is Knowledge Quest Academy, with a rating of 6. Knowledge Quest Academy has 343 students. The public schools in Milliken belong to Johnstown-Milliken Re-5j School District. Weld County Re-1 School District is close and has lesser ratings than Johnstown-Milliken Re-5j School District. Nearby Windsor Re-4 School District is better, with a rating of 7. The population of Milliken is 6,085. Johnstown-Milliken Re-5j School District enrolls 52% of the population of Milliken.