Smelt

Smelt may refer to:


 * Smelting, chemical process
 * The common name of various fish:
 * Smelt (fish), a family of small fish, Osmeridae
 * Australian smelt in the family Retropinnidae and species Retropinna semoni
 * Big-scale sand smelt Atherina boyeri
 * Deep-sea smelts in the family Bathylagidae
 * Great Lakes smelts (North American) in the family Osmeridae and genera Allosmerus (also called whitebait smelt), Hypomesus, Mallotus, Osmerus, Spirinchus and Thaleichthys
 * Herring smelt of the family Argentinidae
 * Mediterranean sand smelt, Atherina hepsetus
 * New Zealand smelt in the family Retropinnidae and species Retropinna retropinna
 * some species in Silverside family Atherinidae
 * Smelt-whitings in the family Sillaginidae
 * Whitebait smelts (North American) in the family Osmeridae and genera: Allosmerus, Hypomesus and Mallotus