OII

'''OII''' may refer to:

==Organisations== * OII, market exchange symbol for Oceaneering International * Office of Innovation and Improvement, an office of the United States Department of Education * Organisation Intersex International, a global advocacy and support group for people with intersex traits * Oxford Internet Institute, a multi-disciplinary department, part of the University of Oxford, England

==See also== * Organisation Intersex International Australia * OII Europe * Oii-Chinese, the Chinese language affiliate of Organisation Intersex International

{{disambiguation}}