Sedna

Sedna may refer to:
 * Sedna (mythology), the Inuit goddess of the sea
 * Sedna (beverage), a tonic wine, formerly made in Belfast
 * Sedna (database), a native XML database
 * 90377 Sedna, a minor planet, a trans-Neptunian object
 * Doriprismatica sedna, a species of nudibranch
 * Sedna Finance, a structured investment vehicle
 * Sedna Planitia, a landform on the planet Venus