2P

2P may refer to:

• 2P/Encke, official designation of Comet Encke
• 2p, an arm of Chromosome 2 (human)
• 2p, an atomic orbital for electrons
• Two-photon absorption
• Two-photon excitation microscopy

• Airphil Express, a Philippines airline, IATA code 2P
• LMS Class 2P 4-4-0, a British locomotive

• 2P, a 408mm artillery piece from the Soviet Union
• 2p, a two pence British coin
• 2P, rapper 2 Pistols
• 2P reserves, proven reserves of fossil fuels
• 2P, meaning "player 2" in fandoms which can include inverting a character's personality and appearance

• P2 (disambiguation)