Oak Brook, Illinois, is a suburban village located in DuPage and Cook counties. It is known for its affluent residential areas and is home to several corporate headquarters, including the McDonald's Corporation. The village features a mix of commercial and residential spaces, making it a desirable place to live and work. The area offers various amenities, including shopping centers like the Oakbrook Center, which is an upscale outdoor mall. Oak Brook also has numerous parks and recreational facilities, providing residents and visitors with opportunities for outdoor activities and community events throughout the year.