Oio or OIO may refer to:
*
Oio Region
Oio (historically WoyeBühnen, Stephan (1992). ''Place Names as an Historical Source: An Introduction with Examples from Southern Senegambia and Germany.'' History in Africa, 19, 45-101. doi:10.2307/3171995. (UR(14-06-2021))) is a region in Guine ...
in Guinea-Bissau
*
Oio railway station in New Zealand
* ''ōʻio'', the Hawaiian name for
bonefish
The bonefish (''Albula vulpes'') is the type species of the bonefish family (Albulidae), the only family in order Albuliformes.
History
Bonefish were once believed to be a single species with a global distribution, however 9 different species ...
*
Overseas Investment Office
The Overseas Investment Office is the New Zealand government agency responsible for regulating foreign direct investment into New Zealand.
The Office is responsible for high value investments (2006: NZD $100m+), investments in sensitive land an ...
in New Zealand
*
Iodine Dioxide
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