5050

5050 or variation, may refer to:


 * A.D. 5050, a year in the 6th millennium CE
 * 5050 BC, a year in the 6th millennium BCE
 * 5050 (number), a number in the 5000s range
 * 5050 Doctorwatson, an asteroid in the Asteroid Belt, the 5050th asteroid registered
 * Nagoya Municipal Subway 5050 series, an electric multiple unit train type
 * Tobu 5050 series, a variant of the Tobu 5000 series electric multiple unit train type
 * Tokyu 5050 series, an electric multiple unit train type
 * USAir Flight 5050, a 1989 flight that crashed on takeoff from LaGuardia, New York City, US