Seiden may refer to:
the main hall of a Japanese castle the RG Veda manga
People with the surname Esther Seiden (1908–2014), Polish-Israeli-American mathematical statistician Frank Seiden (c.1861-1931), American Yiddish singer and magician Joseph Seiden (1892–1974), director, producer of Yiddish films Lewis Seiden (1934–2007), American pharmacologist Rudolph A. Seiden (1900–1965), Austrian-American chemist Celada-Seiden model Al Seiden, American basketball player