Matsudai may refer to:
Places Matsudai, Niigata, a former town in Niigata, Japan, now merged into Tōkamachi Matsudai Station, a train station in Tōkamachi, Niigata, Japan
Species Acupicta bubases matsudai, a butterfly in the family Lycaenid Euseboides matsudai, a beetle in the family Cerambycidae Phyllonorycter matsudai, a moth of the family Gracillariidae Sparganothis matsudai, a moth in the family Tortricidae
Other uses Miyajima Matsudai Kisen, a Japanese ferry company
See also Matsudaira clan