CCS Libraries — CCS is a group of 25 public libraries in the north and northwest suburbs of Chicago that share a catalog. You can search all of their catalogs at once or individually from the link above.  The Grayslake Library is not a CCS Library.

List of CCS libraries:

Algonquin Area Public Library
Cary Area Public Library
Crystal Lake Public Library
Des Plaines Public Library
Fox River Valley Public Library
Ela Area Public Library (Lake Zurich)
Evanston Public Library
Fremont Public Library (Mundelein)
Glencoe Public Library
Glenview Public Libray
Highland Park Public Library
Huntley Area Public Library
Lake Forest Library
Lake Villa Public Library
Lincolnwood Public Library
McHenry Public Library
Niles Public Library
Northbrook Public Library
Park Ridge Public Library
Prospect Heights Public Library
Round Lake Area Public Library
Wilmette Public Library
Winnetka-Northfield Public Library
Zion-Benton Public Library

LINKin — LINKin is a group of ten libraries located in Illinois that share a catalog. You can search all of their catalogs at once or individually from the link above.  The Grayslake Library is not a LINKin Library.

List of LINKin libraries:

Arlington Heights Memorial Library
Cook Memorial Public Library (Libertyville)
Deerfield Public Library
Elmhurst Public Library
Gail Borden Public Library (Elgin)
Naperville Public Library
Poplar Creek Public Library (Streamwood)
Skokie Public Library
Waukegan Public Library
Wheaton Public Library

Other local catalogs:

WorldCat – Connect to resources across Illinois and the world through this portal.

More catalogs from the North Suburban Illinois Area.