P12 or P–12 may refer to:

Aircraft Boeing P-12, an interwar biplane operated by the United States Navy and Army Lippisch P.12, a German aircraft design study

Transportation Chery P12, a proposed Chinese pickup truck Eastover–Addison Road Line, a bus route in Washington, D.C. London Buses route P12 Nissan Primera (P12), a family car P12 road (Zimbabwe)

Weapons P-12 (missile), a Chinese ballistic missile Grendel P12, a .380 pistol FN P-12, a shotgun Heckler & Koch P12, a pistol

Other uses P–12 (education), a designation for the sum of primary and secondary education in Australia P-12 radar, a Soviet 2D VHF radar system Papyrus 12, a biblical manuscript PKCS #12, a cryptographic standard P-12 (mountain lion), a mountain lion that lived in the Santa Monica Mountain National Recreation Area