Cid may refer to:

• Cid (soil)
• Cubic inch (c.i.d., cid), a displacement unit for internal combustion engines
• Cid, a slang term for lysergic acid diethylamide (LSD)
• Content-ID, a URI scheme (cid:) that allows the use of MIME within email

Look up CID, Cid, or cid in Wiktionary, the free dictionary.

• El Cid (1043–1099), 11th-century Castilian nobleman
• Cid Corman (1924–2004), poet
• Cid Samson (born 1943), Canadian politician
• Gérald Cid (born 1983), footballer
• Hilda Cid (born 1933), Chilean scientist

• CID (disambiguation)
• El Cid (disambiguation)
• Sid (disambiguation)

This disambiguation page lists articles associated with the title Cid.
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