SIB or sib may refer to:
Arts and media Sinar Indonesia Baru, a newspaper Systems in Blue, a German band "S.I.B. (Swelling Itching Brain)", a song from the 1979 Devo album Duty Now for the Future
Businesses Savings and Investment Bank, a failed bank on the Isle of Man South Indian Bank Social Investment Business, UK charity
Computing Service Implementation Bean, a Java object A scale-index-base byte in x86 processor
Organisations School of International Business, Reutlingen University, Germany Scientex Incorporated Berhad, a Malaysian stretch film manufacturer Securities and Investments Board, UK later the Financial Services Authority Sekolah Indonesia Bangkok, an Indonesian school Sidang Injil Borneo, the Borneo Evangelical Church Special Investigation Branch of UK military police Special Investigations Branch of the New Zealand Defence Force Military Police Student Welfare Organisation in Bergen (Studentsamskipnaden i Bergen, SiB) Swiss Institute of Bioinformatics Special Investigations Bureau (disambiguation)
Places Sib, Khuzestan, a village in Khuzestan Province, Iran As Sib, a town in Oman Sibiti Airport (IATA airport code), in the Republic of the Congo Sunny Isles Beach, Florida, US
Science Sib (anthropology), a group of people recognized by an individual as kin Sib RNA, a non-coding sRNA found in E. coli Simple biosphere model, used with atmospheric general circulation models Self-injurious behaviour, in self-injury