闭鞘姜科是单子叶植物姜目的一科。闭鞘姜科有4属，约200种，原产于热带地区。多年生草本。

• 闭鞘姜属（Costus）
  • 闭鞘姜（Costus speciosus）
• Dimerocostus
• Monocostus
• Tapeinocheilos

Costaceae, or the Costus family, is a family of pantropical monocots. It belongs to the order Zingiberales, which contains horticulturally and economically important plants such as the banana (Musaceae), bird-of-paradise (Strelitziaceae), and edible ginger (Zingiberaceae). The seven genera in Costaceae together contain about 100 species (1 in Monocostus, 2 in Dimerocostus, 16 in Tapeinochilos, 2 in Paracostus, ca. 8 in Chamaecostus, ca. 5 in Hellenia, and ca. 80 in Costus). They are native to tropical climates of Asia, Africa, Central America, and South America. Several species are frequently found in cultivation.