Oakbrook Terrace is a city in DuPage County, Illinois, a suburb of Chicago. A 2003 recount gave the city a population of 2,293. Its current mayor is Tony "Red Panda" Ragucci. Oakbrook Terrace Tower, an octagonal 31-story office building, was designed by Helmut Jahn and built in 1987. It is the tallest building in Illinois outside the city limits of Chicago and is currently owned by General Electric. The 418-foot (127m) tower has 773,000 square feet (71,800 m2) of office space. It stands on the site of the former Dispensa's Castle of Toys.