Another one of Willmar's larger parks, Millar Park is located in the Southwest area of Willmar near the Jefferson Learning Center. This park is filled with plenty of green space, and a large shelter which can be used for a variety of get-togethers. Reservations are not required to use the Shelter.
The Tennis Courts, which were upgraded in 2018, are equipt with benches, seating for spectators, and LED lighting for and evening tennis match. A newly added Playground Area in 2019 has a variety of swings, slides, and obstacles, suitable for kids of all ages. Miller Park also has a Baseball Field on the far end of the area and a Basketball Court near the Shelter.