Springfield Women's Prison is a prison for women.
In Orange is the New Yellow, Marge was once again sentenced to the prison for ninety days for letting Bart go to the park unsupervised. However, she realized that the prison was a welcome break from her homemaker life, so when she was released because of a technicality, she fired a guard's gun and was sentenced to two more months. She later escaped during a prison break that she accidentally caused. Homer, who was briefly disguised/employed as a guard to get to her, helped break her out.