The phone number for the McDonald's corporate office is 800-244-6227. The Oak Brook, Illinois, offices are open seven days a week, from 7 a.m. until 7 p.m., CST.
The McDonald's Corporation encourages people to contact its corporate offices for a variety of needs. However, the company website provides more information on some matters, including restaurant feedback, trademark inquiries, marketing and advertising questions, and questions about corporate social responsibility. The company suggests that customers search the company website prior to calling the corporate office, as some of the information may already be available to them there. If the website doesn't address the issue, McDonald's corporate employees are available 12 hours a day, seven days a week, to provide assistance.