J73 (disambiguation)

J73 could refer to:


 * General Electric J73, a type of jet engine
 * HMS Niger (J73), A British minesweeper
 * Johnson solid J73, a geometric shape
 * JOVIAL J73, a computer programming language
 * LNER Class J73, a class of British steam locomotives
 * TransMilenio J73, a Colombian bus rapid transit route