In July 1948, the Board of Trustees adopted a constitution and by-laws, stating that services were free for the residents of Baldwin County.

"[5] Funded by cashing in bonds, the library moved from its location on Hancock Street to the first floor of the Veterans' Building in 1953.

A third branch, the Floride Allen Library, opened in October 2008 but closed in 2011 in response to state budget cuts.

The Lake Sinclair Library building is in a storefront unit located at 130 Log Cabin Road NE near the entrance to the Kroger Shopping Center.

The Lake Sinclair Library does house children's, young adult, and general fiction collections with some non-fiction for checkout including DVDs.