The North Castle Public Library serves a community of approximately 12,000 people across its Armonk and North White Plains branches. It offers a wide array of resources and programs for all ages, including extensive book and digital collections, literacy sessions, and cultural events. The library is supported by its "Friends" group, which generously funds a robust programming schedule, encompassing children's activities like toddler yoga and science labs, and teen programs such as gaming and book clubs. For adults, the library provides various programs including book clubs, film series, and classes on topics like current affairs and computer skills. The library also provides access to e-books, audiobooks, magazines, movies, and music, along with services like librarian assistance, printing, faxing, and scanning. Additionally, it offers free museum passes for cardholders and features a young adult room equipped with gaming consoles and 3D printers. The "Friends of the North Castle Public Library" also sponsor the Armonk Players and the Armonk Outdoor Art Show, further enriching the community.