Anabasis (from Greek ana = "upward", bainein = "to step or march") is an expedition from a coastline up into the interior of a country. Anabase and Anabasis may also refer to:

• Anabase (1924), a poem by Saint-John Perse
• Anabasis, classic text by the Greek writer Xenophon (431–355 BC), about the expedition of the Persian prince Cyrus the Younger against his brother, King Artaxerxes II
• Anabasis Alexandri, classic text by the Greek historian Arrian (86 – after 146 AD), about Alexander the Great (336–323 BC)
• Anabasis (1930), T. S. Eliot's English translation of Perse's poem, also translated in 1970 by Roger Little
• Anabasis (1994), a novel by Ellen Gilchrist