Marjoram (Origanum majorana, Lamiaceae) is a cold-sensitive perennial herb or undershrub with sweet pine and citrus flavors. It is also called Sweet Marjoram or Knotted Marjoram and Majorana hortensis. The name marjoram (Old French majorane, Medieval Latin majorana) does not directly derive from the Latin word maior (major).

Marjoram is cultivated for its aromatic leaves, either green or dry, for culinary purposes; the tops are cut as the plants begin to flower and are dried slowly in the shade. It is often used in herb combinations such as Herbes de Provence and Za'atar.