N15 may refer to:
Roads N15 road (Belgium), a National Road in Belgium Route nationale 15, in France N15 road (Ireland) A15 motorway (Netherlands) Nebraska Highway 15, in the United States
Vehicles , a submarine of the Royal Navy LNER Class N15, a British 0-6-2 steam locomotive class LSWR N15 class, a British 4-6-0 steam locomotive Nissan Almera (N15), a Japanese automobile sold in Europe Nissan Pulsar (N15), a Japanese automobile sold domestically
Other uses N15 (Long Island bus), New York Enterobacteria phage N15 Kingston Airport (Nevada), in Lander County, Nevada, United States London Buses route N15 Nitrogen-15, an isotope of nitrogen Tonga language (Malawi) N15, a postcode district in the N postcode area
See also 15N (disambiguation)