虻科（学名Tabanidae），又名马蝇，是双翅目下的一科，其中昆虫主要靠吸食哺乳动物的血液维生。

未分下科
Zophina

Horse-flies (for other names, see common names) are true flies in the family Tabanidae in the insect order Diptera. They are often large and agile in flight, and the females bite animals, including humans, to obtain blood. They prefer to fly in sunlight, avoiding dark and shady areas, and are inactive at night. They are found all over the world except for some islands and the polar regions.