Gasan may refer to:
Places Həsənqaydı (also spelled Gasan-Gaydi), a village in Azerbaijan Gasan, Marinduque, a municipality in the Philippines on the island of Marinduque Gasan (mountain), in South Korea 가산 (경북) Gasan, Gasan-dong, a dong (neighbourhood) of Geumcheon-gu in Seoul, South Korea Gasan Digital Complex station, a subway station in Seoul, South Korea
People Gasan, also known as Gasan Jōseki (1275–1366), a Japanese Soto Zen master Gasan Gasanov, a Russian mixed martial artist Gasan Umalatov, a former Russian professional football player