A dome car is a type of railway passenger car that has a glass dome on the top of the car where passengers can ride and see in all directions around the train. It also can include features of a coach, lounge car, dining car, sleeping car or observation. Beginning in 1945, dome cars were primarily used in the United States and Canada, though a small number were constructed in Europe for Trans Europ Express service, and similar panorama cars are in service on Alpine tourist railways like the Bernina Express.

In North America, dome cars were manufactured by the Budd Company, Pullman Standard and American Car & Foundry. Southern Pacific Railroad built its own dome cars in its Sacramento, California, shops. In the 1990s Colorado Railcar began producing dome cars. Generally, seats in the dome were considered "non-revenue" like lounge car seats.