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
- Al Seiden, American basketball player
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