N19 may refer to:
Roads N19 road (Belgium), a National Road in Belgium Route nationale 19, in France N19 road (Ireland) Nebraska Highway 19, in the United States
Other uses N19 (Long Island bus) Aztec Municipal Airport, in Aztec, New Mexico, United States , a submarine of the Royal Navy London Buses route N19 Nitrogen-19, an isotope of nitrogen N19, a postcode district in the N postcode area