L25

L25 may refer to:
 * 50S ribosomal protein L25
 * L25 ribosomal protein leader
 * HMS L25, a submarine of the Royal Navy
 * HMS Scarborough (L25), a sloop of the Royal Navy
 * HMS Southdown (L25), a destroyer of the Royal Navy
 * Klemm L.25, a German monoplane
 * McDonnell L-25, an American experimental convertiplane