55 may refer to:
55 (number), the natural number following 54 and preceding 56 55 BC AD 55 1955 2055
Science Caesium, by the element's atomic number
Astronomy Messier object M55, a magnitude 7.0 globular cluster in the constellation Sagittarius The New General Catalogue object NGC 55, a magnitude 7.9 barred spiral galaxy in the constellation Sculptor 55 Nights, mixtape by british rapper Future
Transportation The highest speed limit allowed in the United States between 1974 and 1986 per the National Maximum Speed Law Highway 55, several roads Route 55 (disambiguation), bus and tram routes DAF 55, a small family car
Film 55 Days at Peking, a film starring Charlton Heston and David Niven
Other uses Gazeta 55, an Albanian newspaper Agitation and Propaganda against the State, also known as Constitution law 55, a law during Communist Albania +55, the code for international direct dial phone calls to Brazil 5:5, law enforcement code for handcuffs 55 (album), by the Knocks "55", a 2022 song by Raymix "55 (Hamsa oua Hamsine)", an instrumental by the Master Musicians of Joujouka from Brian Jones Presents the Pipes of Pan at Joujouka "Fifty Five", a song by Karma to Burn from the album Arch Stanton, 2014 55 Pandora, a main-belt asteroid
See also 55th (disambiguation) 55th Regiment of Foot (disambiguation) Channel 55 (disambiguation) Type 55 (disambiguation) Class 55 (disambiguation)