55

55 may refer to:

• 55 (number)
• 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

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

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 Regiment of Foot (disambiguation)
• Channel 55 (disambiguation)
• Type 55 (disambiguation)
• Class 55 (disambiguation)