Caid may refer to: Qaid (also caid or kaid), various forms of responsible official found in places ranging from the Kingdom of Sicily to rural North Africa Caid (sport), a form of football popular in Ireland until the mid-19th century The Kingdom of Caid, a regional area of the Society for Creative Anachronism CAID as an abbreviation may refer to: Computer-aided industrial design Contemporary Art Institute of Detroit Conditional Access Identification CAID (technology), a Chinese advertising technology for tracking users