1N

1N or 1-N may refer to:


 * 1st parallel north
 * Canon EOS-1N
 * Bell UH-1N Twin Huey, part of the U.S. Marine H-1 upgrade program
 * Canon F-1n, a model of Canon F-1
 * Olympus OM-1n, a model of Olympus OM-1
 * SH 1N, the North Island section of New Zealand State Highway 1
 * 1N, a model of Toyota N engine
 * UH-1N Huey, see Bell UH-1 Iroquois
 * Secondary State Highway 1N (Washington 1937-1943), a loop west of Centralia
 * Secondary State Highway 1N (Washington 1943–1970), now Washington State Route 507 from Centralia to Tenino
 * CUH-1N, Canadian version of what became the Bell 212
 * Sikorsky HSS-1N Seabat, see Sikorsky H-34
 * F7F-1N, see Grumman F7F Tigercat
 * F8F-1N Bearcat, see Grumman F8F Bearcat
 * XF8F-1N, see Grumman F8F Bearcat
 * J/1N Alpha, see Auster Autocrat
 * One newton, see Newton (unit)