Yes, Marine One (the call sign for any U.S. Marine Corps helicopter carrying the President) does have a bathroom on board. While the specific models in service in 2026—including the long-serving VH-3D Sea King and the newer Sikorsky VH-92A Patriot—are compact compared to the massive Air Force One, they are outfitted with a small, functional lavatory located in the rear of the cabin. This is a critical feature because while the President's typical "hops" from the White House to Joint Base Andrews are short, Marine One is also used for longer journeys and must be prepared for the President to remain on board for several hours in the event of a security contingency. The interior of the VH-92A is designed with a "VIP" layout that includes soundproofing, secure communications, and basic amenities, ensuring the Commander-in-Chief has a self-contained, secure environment for the duration of the flight.