Most McDonald's restaurants are now open until midnight or later, with a growing number returning to 24-hour operations. However, exact closing times can vary by location, especially in malls, airports, and other areas with restrictions. Typically, many McDonald's close around 10 or 11 PM, but many are extending hours to midnight or overnight, and some in larger cities remain open 24/7 to cater to late-night customers. It's best to check the specific McDonald's location for its precise hours.