Challenger may mean:

• Space Shuttle Challenger, the American space shuttle which broke up shortly after liftoff on January 28, 1986
• Challenger was the name of the Apollo 17 lunar module.
• Canadair Challenger series of business jets manufactured by Bombardier
• Challenger Equipment, AGCO Corporation's division of Agricultural machinery
• HMS Challenger, any of eight Royal Navy ships, most notably the one carrying the Challenger expedition, a British oceanographic survey of 1872-1876
• One of 3 Challenger tanks from different periods used by the British Army
• Union Pacific Challenger is a 4-6-6-4 steam locomotive.
• The Challenger was a named passenger train operated between 1935 and 1971 by the Union Pacific Railroad and several partner railroads and ran between Chicago and the West Coast of the United States.
• Challenger Deep, the deepest point in the world's oceans
• Challenger Plateau, a submarine rise in the Tasman Sea close to the New Zealand coast
• Challenger School, a private school in the western United States
• Challenger Elementary a school in Issaquah, Washington, USA
• Challenger tournament, a classification for some low-tier tennis tournaments
• Challenger, a Nintendo Famicom game
• Dodge Challenger, Dodge's entry to the pony-car market
• Mitsubishi Challenger, an SUV sold in export markets as the Pajero Sport/Montero Sport
• Prof. G.E. Challenger, a fictional scientist/adventurer created by Arthur Conan Doyle who debuted in the novel The Lost World.
• The ATP Challenger Series is a series of professional tennis tournaments sanctioned by the ATP.

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