The Central Skagit Library District was created by ballot initiative in November 2012.  The proposed library district boundaries were that of the Sedro Woolley School District. The initiative passed by 60.14%. 

In the Spring of 2013 the Skagit Board of County Commissioners appointed the 5 members of the Board of Trustees for the library district. This Board drafted and approved the Board bylaws. In the fall of 2013 the Board developed the budget for fiscal year 2014 and set the levy at $.50 per $1000 of assessed property value. The first revenues into the library district began in spring of 2014.

Throughout 2014 the Board worked to secure office space and hire a library director. The first location at 100 West State Street in Sedro-Woolley was a 750 square foot office. The library district implemented digital services to provide patrons access to eBooks, digital audiobooks, digital journals and other databases for research. 

By 2015, the library began checking out physical materials such as books, movies and audiobooks. The first summer library programs were offered throughout the library district. During this period, reciprocal borrowing agreements with Upper Skagit Library and La Conner Regional Library were authorized. 

In January of 2016, Sedro-Woolley Mayor Keith Wagoner presented a proposal to create a library partnership with the library district whereby the library district would operate the library and the two entities would build a new library facility. The library district held a series of public meetings throughout the district to gather input from residents concerning a possible partnership with the city of Sedro-Woolley. Feedback was overwhelming positive regarding this possibility. Negotiations with the city of Sedro-Woolley took place throughout 2016. During that period, the library district received a bookmobile through a grant process with the Jefferson County Library District. 

In 2017 the library district began bookmobile services at locations in Samish, Hickson, Big Lake and Clear Lake. The library also secured a 2500 square foot, updated, storefront location at 720 Metcalf Street in Sedro-Woolley.  The Library Partnership Interlocal Agreements with the city of Sedro-Woolley were finalized in July of 2017. A pre-design process was launched for a new library facility to be located in the downtown core of Sedro-Woolley. SHKS Architects and Berk Consulting conducted a needs assessment and a series of public meetings to gather input and share progress on the pre-design process. In December of 2017 the governing authorities of the city and library district approved the final decision on the location, concept design, and budget for the new library. This triggered the 60-day timeframe to consolidate the Sedro-Woolley Public Library and the Central Skagit Library District. 

In February 2018, public library services were consolidated and moved into the city library location at 802 Ball Street in Sedro-Woolley. Processing and administrative services remained at the 720 Metcalf location. Renovations and restructuring of the Ball Street location floor plan were made prior to reopening as the Central Skagit Sedro-Woolley Library. The Library Partnership requested and received a $1.5M capital appropriation from the legislature to supplement the $8 M in local funds for the project. The new library project moved into the design phase and site preparation began at 110 West State Street.

The new library project is expected to go to bid in April of 2019 with construction to begin in June of 2019.