[1][page needed] Philanthropist Philip S. Miller and his wife, Jerri, donated $25,000 for library construction in May 1967.
[2][page needed] The library opened at a temporary space at 311 Third St, Castle Rock, Colorado in August 1967.
[4][page needed] The first book depository in Parker, Colorado opened in a small building, which no longer exists, on the north side of Main Street.
The library district receives approximately $150,000 per year from its 10% share of the Miller Charitable Trust Fund.
[8][page needed] The ability to notify patrons of holds and overdue notices by email was introduced in 1998.
In September 2003, the Philip S Miller Library moved to a new facility (100 S Wilcox Street, Castle Rock).
The library district was recognized for the promotion of the Page to Stage Productions literary theater tour.
Douglas County Libraries has a stated mission of elevating the community by inspiring a love of reading, discovery, and connection.
Bark for Books allows school-age children to improve their literacy skills by reading to a dog from Intermountain Therapy Animals.