The tangor (C. reticulata × C. sinensis) is a citrus fruit hybrid of the mandarin orange (Citrus reticulata) and the sweet orange (Citrus sinensis). The name "tangor" is a formation from the "tang" of tangerine and the "or" of "orange." Also called the temple orange, its thick rind is easy to peel and its bright orange pulp is sour-sweet and full-flavoured. The name "temple orange" is taken from the name of citrus magnate William Chase Temple.

Tangors are purposely bred or accidental hybrids of the sweet orange (Citrus sinensis) and the mandarin (Citrus reticulata), producing several varieties.

Since the 19th and early 20th centuries, tangors have been cultivated in tropical and warm temperate world regions, such as southern Japan, Florida, Caribbean islands, South Africa, and Malaysia.

The 'Ortanique' variety may be attacked by aphids (Aphis gossypii), rust mite (Phyllocoptruta oleivora) or various species of scale insects and moths. The fungus Sphaeropsis tumefaciens may cause knots in twigs.