ONL

ONL may stand for:


 * Online, as used in text messaging and academic circles
 * Orange and Lemons, a Filipino band
 * Order of Newfoundland and Labrador, a title
 * Outer nuclear layer, a layer of the retina
 * Oosterhuis Lénárd architecture office by Kas Oosterhuis
 * Opening Night Live
 * O'Neill Municipal Airport