HKO may refer to:
* ''
Hello Kitty Online'', a video game
*
Helsinki Philharmonic Orchestra
The Helsinki Philharmonic Orchestra (in Finnish: ; in Swedish: ; literal English translation: Helsinki City Orchestra; commonly abbreviated as HPO) is an orchestra based in Helsinki, Finland. Founded in 1882 by Robert Kajanus, the Philharmonic ...
(Finnish: )
*
Hong Kong Observatory
The Hong Kong Observatory is a weather forecast agency of the government of Hong Kong. The Observatory forecasts the weather and issues warnings on weather-related hazards. It also monitors and makes assessments on radiation levels in Ho ...
*
Hankou railway station, China Railway pinyin code HKO
{{Disambiguation