OIP may refer to:
*
Ohio Institute of Photography
The Ohio Institute of Photography (OIP) was founded in 1971. In 1977, construction began on the main building. Classes began in the new building, designed specifically for photographic education, the following September. The building was expa ...
, US
*
Ovamboland Independence Party
The National Democratic Party (NDP) is a political party in Namibia. It was formed in 1973 as the ''Ovamboland Independence Party'' (''OIP'') by Silas Ipumbu. It took the name NDP to contest the elections to the Ovambo Legislative Assembly, by t ...
, later National Democratic Party, Namibia
*
Oil-for-Food Programme, a former UN programme in Iraq
** Former
Office of the Iraqi Programme
*
× ''Oncidopsis'' (''Oip.''), an orchid nothogenus corresponding to ''Miltoniopsis'' × ''Oncidium''; see
× ''Burrageara''
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