Libraries often band together in consortia for cooperative resource purchasing and sharing. The International Coalition of Library Consortia, or ICOLC, is an informal group of about 150 such consortia from around the world.
The Alberta Library
AMICAL Consortium
Amigos Library Services
Bibliographic Association of the Red River
Bibliographical Center for Research
Boston Library Consortium
Califa, a library consortium representing 200+ libraries in California
Catamount Library Network
Center for Research Libraries
Chemeketa Cooperative Regional Library Service
CLEVNET
Colorado Alliance of Research Libraries
Colorado Library Consortium
ConnectNY
CONSORT Colleges
Consortium of Academic and Research Libraries in Illinois
Consortium of Universities of the Washington Metropolitan Area
Detroit Area Library Network
Digital Library Federation
Digital Scriptorium
Flanders Heritage Library
Gauteng and Environs Library Consortium
HBCU Library Alliance
International Coalition of Library Consortia
International Internet Preservation Consortium
Jefferson County Library Cooperative
Keystone Library Network
Library and Information Resources Network
Library Information Network of Clackamas County
LOUIS: The Louisiana Library Network
Lyrasis
M25 Consortium of Academic Libraries
Massachusetts Library Association
MCIT Library Consortium
Membership Libraries Group
Metropolitan Library Service Agency
Metropolitan New York Library Council
Michigan eLibrary
Michigan Library Consortium
Midwest Transportation Knowledge Network
Minitex
Minuteman Library Network
Missouri Library Network Corporation
MOBIUS
Municipal Library Consortium of St. Louis County
National and State Libraries Australia
National Research Libraries Alliance
NC Live
NEFLIN
NELINET
NEOS Library Consortium
New York Area Theological Library Association
Nylink
Ohio Public Library Information Network
OhioLINK
Ontario Council of University Libraries
Orbis Cascade Alliance
Pacific Manuscripts Bureau
Research Libraries Group
Rigler-Deutsch Index
SAILS
SELMS
SearchOhio
South Central Library System
South East Academic Libraries System
Southern Ontario Library Service
System Wide Automated Network (SWAN) Tampa Bay Library Consortium TexShare The Library Consortium (TLC) TRAILS UAA/APU Consortium Library Utah Academic Library Consortium Vermont Organization of Koha Automated Libraries Washington Research Library Consortium