Suicide doors are automobile doors that are hinged on the edges closer to the back of the vehicle. The name refers to the perceived greater danger of such a door falling open at speed.

Such doors were commonly seen on cars manufactured in the first half of the 20th century. Post-World War II examples are almost universally the rear doors of four-door cars.

The most well-known use of suicide doors on post-World War II automobiles was the glamorous Lincoln Continental sedan from 1961 through 1969, and even more dramatically, on the unique Lincoln Continental 4-door convertible from 1961 through 1967 (the last 4-door convertible built in America.) Since the 4-door Lincoln convertible did not have a center "B" pillar, the rear door glass was designed to electrically retract a few inches when the rear doors were opened in order for the weatherstripping to clear the front door glass. (Unfortunately, if the battery was dead, the only way out of the back seat was to crawl over the front seat!)

For a time, the last true, independently opening suicide doors were fitted on the Ford Thunderbird 4-door sedan from 1967 through 1971, after which their use ceased due to safety concerns. More recently, rear suicide doors that cannot be opened until the regular front doors are opened have been appearing on a number of vehicles, including extended cab pickup trucks. Nevertheless, in 2004, true independent suicide doors reappeared, this time on the new $300,000 Rolls Royce.

Models of automobile that featured suicide doors include:

• Citroën 2CV - early models
• Citroën Traction
• Chrysler Imperial Parade Phaeton
• Chrysler Royal
• Facel Vega - 4-door models
• Fiat Topolino
• Ford Thunderbird - 1967-1971 4-door models
• Honda Element - 2003-present. Has conventional front, with suicide half doors in rear
• Lincoln Continental - 1961-1969 4-door sedans, 1961-1967 4-door convertibles
• Mazda RX-8 - Has conventional front doors, with suicide half-doors in rear
• Panhard Dyna
• Pierce Silver Arrow
• Renault 4CV
• Rolls-Royce Phantom
• Rover P4 - Had conventional front doors, with suicide rear doors
• SAAB (92, 93 and 95/96 early models)
• Saturn ION coupe - Has conventional front doors, with suicide half-doors in the rear.
• Saturn SC series - Predecessor to ION coupe; second-generation models feature one rear suicide half-door on driver's side