Double J or Double Jay may refer to:
Double Jay, the former name of Australian radio station Triple J Double J (radio station), the Triple J-run rebranding of radio station Dig Music Double-J stent, a ureteric stent used in urology Double-J (manga), a comedy manga by Eiji Nonaka Double Jay (horse), an American Thoroughbred racehorse Double J, ring name of professional wrestler Jeff Jarrett
See also JJ (disambiguation)