HB

HB may refer to:

*HB (House Bill) in government terms
*HB (Hurry Back) in Internet slang
*HB (car), 1920s automobile
*HB (cigarette), German brand of cigarettes
*HB Ice Cream, Irish brand
*HB (Band), Finnish symphonic metal musical group
*H-B Woodlawn secondary education program (from the combination of the Hoffman-Boston and Woodlawn programs), in Arlington, Virginia

; People
* H. B. Acton (1908-1974), political philosopher
* H. B. Bailey (1936-2003), NASCAR driver
* H. B. Higgins (1851-1929), Australian politician
* H. B. Reese (1879-1956), candy maker
* H. B. Warner (1875-1958), motion picture executive

as an abbreviation or acronym

* , an AAR reporting mark for Hampton and Branchville Railroad
* Hb, or Hemoglobin
* H-B, for Hanna-Barbera, a cartoon studio, later renamed Cartoon Network Studios
* HB, for Havnar Bóltfelag, football team in the Faeroe Islands
* HB, code for Hansestadt Bremen on German license plates
* HB, a medium grade of pencil lead
* HB, in the Brinell scale hardness test
* HB, code for the pre-TOPS designation of locomotives in British Rail Class 74
* HB, for Helbreath, a 1999 massively multiplayer online role-playing game
* HB, abbreviation for Half-Back, an Australian Rules football position