The Caldwell Public Library's resources are available to the general public, but only registered patrons may borrow library materials.

North Caldwell residents can borrow materials from the Caldwell Public Library upon payment of an annual fee.  The library card is valid for one year from the date of registration for North Caldwell residents.

An inter-local agreement between the towns of Caldwell and Essex Fells allows Essex Fells residents to borrow materials from the Caldwell Public Library.  For Essex Fells residents, the library card is valid through the end of the calendar year of registration.

Children, kindergarten age and older and young adults are eligible for a library card. For children under the age of 18, the youth's parent/guardian must provide proof of identification. The parent/guardian must sign the child's registration card.  Potential patrons must present personal identification with proof of current address to obtain a library card.