C83

C83 may refer to:


 * Byron Airport, a public airport serving Contra Costa County, California, USA.
 * Corydoras loxozonus, a freshwater catfish.
 * Ruy Lopez chess openings ECO code
 * Diffuse non-Hodgkin's lymphoma ICD-10 code
 * HMS Southampton (C83), a 1934 British Royal Navy cruiser
 * Labour Standards (Non-Metropolitan Territories) Convention, 1947 code
 * Caldwell 83 (NGC 4945), a spiral galaxy in the constellation Centaurus

C-83 may refer to :
 * C-83 Coupe, an aircraft