PEN may refer to:

• (National Ecological Party), former name of the Brazilian political party Patriota (PATRI)

PEN International, a worldwide association of writers

• English PEN, the founding centre of PEN International

• PEN America, located in New York City

• PEN Center USA, part of PEN America

• PEN Canada, Toronto

• PEN Hong Kong

• Sydney PEN, one of three Australian PENs

• PEN-International, Postsecondary Education Network International, an international partnership of colleges for those with hearing impairment

• Penang International Airport, Malaysia, IATA airport code: PEN

• Penarth railway station, Wales, station code: PEN

• Peruvian sol, ISO 4217 currency code PEN

• , the system of national executive power embodied in the President of Argentina

• Polyethylene naphthalate, a polyester

• Private Enterprise Number, an organisation identifier

• Protective earth neutral in electrical earthing systems

See also

• Pen (disambiguation)

• PEN/Faulkner Foundation