P14, P-14 or P.14 may refer to: * p14arf, a protein involved in cell cycle regulation * Pattern 1914 Enfield, a service rifle used by the British Army during World War I * P-14 radar, a radar used by the Soviet military * P14 (tax), a tax form in the UK * LSWR P14 class, a type of locomotive * the FAA identifier for Holbrook Municipal Airport