Since 1990, River City Millwork has been one of the leading wholesale suppliers of millwork products, including interior and exterior prehung doors, in Chicago. The firm serves lumberyards, home centers and millwork jobbers in northern Illinois, southern Wisconsin and the Greater Chicago region. River City Millwork offers a wide range of products, such as doors, windows, columns, stair parts, deck railings and moldings. It supplies products from a wide range of branded manufacturers, including Castlegate, ODL, Masonite, SIMPSON, Simonton and Fypon.