N25, N-25 or N.25 may refer to:
Roads Route nationale 25, in France N25 road (Ireland) N-25 National Highway, in Pakistan Nebraska Highway 25, in the United States
Other uses N25 (Long Island bus) Blue Heron Airport, in Schoharie County, New York, United States , a submarine of the Royal Navy London Buses route N25 Nitrogen-25, an isotope of nitrogen Nightcord at 25:00 (N25), a character group from Project Sekai