The Decatur Public Library aims to enrich lives by serving as a strong community partner and empowering individuals through equitable access to high-quality education, literature, and technology. It provides a welcoming, community-centered facility offering a wide range of resources, including print and digital collections, programs, and collaborative experiences. The library supports lifelong learning, current interests, and community interaction, while also offering resources for formal education, information literacy, and career development. It is dedicated to strengthening the community educationally, economically, and culturally.

