PLN

PLN or pln or variation, may refer to:

Places

 * Pellston Regional Airport, Pellston, Michigan, USA; IATA airport code
 * Picton, Lennox and Nueva, islands near the southern tip of South America

Organisations

 * Liberal Nationalist Party (Spanish: Partido Liberal Nacionalista), a former political party of Nicaragua
 * National Liberal Party (Panama) (Spanish: Partido Liberal Nacional), a political party of Panama
 * National Liberation Party (Costa Rica) (Spanish: Partido Liberación Nacional), a political party of Costa Rica
 * Perusahaan Listrik Negara, Indonesian government-owned electricity company

Science and technology

 * Phospholamban, a protein
 * Peripheral lymph node
 * Pln, the abbreviation for the orchid genus Pleione
 * .pln, a file extension used by SilkTest
 * Probabilistic logic network
 * Planetary nebula

Other uses

 * Polish złoty, currency by ISO 4217 currency code
 * Palenquero, ISO 639 language code
 * Personal learning network
 * Port letter and number, identifying fishing vessels