C55

C55 or C-55 may refer to:


 * ARM Teniente Juan de la Barrera, an Admirable-class minesweeper of the Mexican Navy
 * Beechcraft C55 Baron, an American civil utility aircraft
 * C55-isoprenyl pyrophosphate
 * Caldwell 55, a planetary nebula
 * Curtiss C-55 Commando, an American transport aircraft
 * JNR Class C55, a Japanese steam locomotive
 * Ogle County Airport in Mount Morris, Illinois
 * Shipowners' Liability (Sick and Injured Seamen) Convention, 1936 of the International Labour Organization
 * Xingu corydoras, a tropical freshwater fish
 * C55, a Wordtank Japanese electronic dictionary