Lasiurus is a genus of bats in the family Vespertilionidae. Its members are known as hairy-tailed bats or red bats.

Phylogeny: The following is the relationship of the three genera formerly included within Lasiurus, based on an analysis of nuclear and mitochondrial DNA.

Species: The following are the described species in Lasiurus:

• Lasiurus arequipae — Arequipa cinnamon red bat
• Lasiurus atratus (Handley, 1996) — greater red bat
• Southern red bat (Lasiurus blossevillii)
• Eastern red bat (Lasiurus borealis)
• Tacarcuna bat (Lasiurus castaneus)
• Hoary bat (Lasiurus cinereus)
• Jamaican red bat (Lasiurus degelidus)
• Hairy-tailed bat (Lasiurus ebenus)
• Southern yellow bat (Lasiurus ega)
• Big red bat (Lasiurus egregius)
• Western red bat (Lasiurus frantzii)
• Cuban yellow bat (Lasiurus insularis)
• Northern yellow bat (Lasiurus intermedius)
• Minor red bat (Lasiurus minor)
• Pfeiffer´s red bat (Lasiurus pfeifferi)
• Seminole bat (Lasiurus seminolus)
• Hawaiian hoary bat (Lasiurus semotus)
• Cinnamon red bat (Lasiurus varius)
• South American hoary bat (Lasiurus villosissimus)
• Western yellow bat (Lasiurus xanthinus)