Speedster may refer to:

• Speedster (automobile), a type of car body closely related to the roadster
• Auburn Speedster, a speedster
• Little Detroit Speedster, also known as the Detroit Speedster, a cyclecar
• Opel Speedster, a roadster
• Studebaker Speedster, a hardtop coupe
• Confederate Hellcat Speedster, a motorcycle designed by South African Pierre Terblanche

• Kadiak KC-2 Speedster, a 1930s American radial engined homebuilt biplane design
• Rearwin Speedster, a 1930s American airplane design
• Theiss Speedster, an American biplane design

• Gar Wood Speedster, a racing boat

• Speedster (album), a studio album by Japanese boy band Generations from Exile Tribe
• Speedster (fiction), a character whose powers primarily relate to superhuman speed
• Speedster, a 1997 PlayStation game by Psygnosis

• Roadster (disambiguation)