Jute is a long, soft, shiny bast fiber that can be spun into coarse, strong threads. It is produced from flowering plants in the genus Corchorus, which is in the mallow family Tiliaceae. The primary source of the fiber is Corchorus olitorius, but such fiber is considered inferior to that derived from Corchorus capsularis. "Jute" is the name of the plant or fiber used to make burlap, hessian, or gunny cloth.

Jute is one of the most affordable natural fibers and second only to cotton in the amount produced and variety of uses. Jute fibers are composed primarily of plant materials cellulose and lignin. Jute fiber falls into the bast fiber category (fiber collected from bast, the phloem of the plant, sometimes called the "skin") along with kenaf, industrial hemp, flax (linen), ramie, etc. The industrial term for jute fiber is raw jute. The fibers are off-white to brown and 1–4 meters (3–13 feet) long. Jute is also called the "golden fiber" for its color and high cash value.

The bulk of the jute trade is centered in South Asia, with India and Bangladesh as the primary producers. The majority of jute is used for sustainable packaging, for products like coffee bags. Production has declined in recent decades as plastic packaging dominated the market instead. This trend has recently begun to reverse, however, as numerous countries phase out or ban the use of single-use plastics.