After World War II, Clay, Platte, and Jackson counties each formed library systems.

It also hosts two installations at community centers in partnership with the Kansas City Parks and Recreation Department that provide automated library services and public Internet access.

Total attendance at live programming events for adults and families and for children was 318,639 patrons.

[5] Annual circulation for the year exceeded one-half million items for each of the Mid-Continent Library's five busiest branches: Liberty, Lee's Summit, Colbern Road, North Independence, and Blue Springs South.

[6] The system has one of the nation's largest Summer Reading Programs, which was completed by 106,846 patrons in fiscal 2009.

[7] On June 21, 2008, Mid-Continent Public Library inaugurated the Midwest Genealogy Center in Independence, Missouri.