POR may refer to:
- Punk-O-Rama, a series of compilations by Epitaph Records
- P450 oxidoreductase
- Country code for Portugal
- Power-on reset
- Principle of Relativity
- Castlevania: Portrait of Ruin
- Fire Emblem: Path of Radiance
- Pori Airport, Finland; IATA airport code POR
- Porth railway station, Wales; National Rail station code POR
- Portland Trail Blazers, an NBA team in the Northwest Division
- Portland, Maine (Amtrak station), United States; Amtrak station code POR
- Por, a J-pop group that Momo (Hitomi Momoi) and her partner Ryo formed
- Plan of Record, abbreviation
- Parties
- The Party of the Right (Yale) of the Yale Political Union
- Party of Regions, a Ukrainian political party
- Party of the Right (disambiguation), various organizations
- Revolutionary Workers' Party (Bolivia) commonly referred to by its Spanish initials POR