The New Castle Branch Library is located in the historic downtown area of New Castle, Colorado. The library has been at the current location, 402 W Main Street, since 1968. It has undergone several renovations; the most recent was completed in April 2013. The newly renovated building features a beautiful fireplace and reading area, local history room, teen area, interactive children's area, and community meeting room. The library has become a vibrant part of the community offering programming for all ages.
The branch also has an active Friends of the Library group who meet monthly.