Seid

• Systemic exertion intolerance disease (SEID), alternative name for myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)

• Alamin Mohammed Seid, Eritrean politician
• Alan R. Seid (born 1957), Palauan businessman and politician
• Joseph Brahim Seid (1927–1970), Chadian writer and politician
• Ruth Seid (1913–1995), American novelist under the pen name Jo Sinclair
• Sattar Seid (born 1987), Iranian cross-country skier
• Seïd Khiter (born 1985), French footballer
• Seid Memić (born 1950), Bosnian singer

• Pasha Seid, in Verdi's opera Il corsaro
• Seid, in Mahomet (play)

• Seid or Seiðr, a type of Old Norse sorcery or witchcraft
• USS Seid (DE-256), a United States Navy destroyer escort of World War II
• Secure element ID (SEID), an aspect of near field communication

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• Sead (disambiguation)
• Seed (disambiguation)

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