About us Sycamore Public Library serves a dynamic community of 17,600 residents in the heart of DeKalb County. Located in a historic Carnegie building in beautiful downtown Sycamore, the library offers collections, programs, and services that foster 21st Century skills and promote a sense of community for patrons of all ages and interests. Sycamore Public Library is staffed by enthusiastic and creative individuals who are passionate about connecting patrons to resources that help them discover, learn, create, and grow. Hours M-TH: 9am-8pm F: 9am-6pm SA: 9am-5pm SU: 1pm-5pm