| Mid-Columbia Libraries | |
|---|---|
 | |
| 46°12′13″N119°9′33″W / 46.20361°N 119.15917°W | |
| Location | Tri-Cities metropolitan area, Eastern Washington, U.S. |
| Type | Public library |
| Established | 1949 |
| Branches | 12 |
| Collection | |
| Size | 566,758 |
| Access and use | |
| Circulation | 2.4 million |
| Population served | 270,125 |
| Other information | |
| Website | midcolumbialibraries |
| References: Washington Public Library Statistical Report, 2023 [1] | |
Mid-Columbia Libraries is a library system in Eastern Washington. There were 270,125 people in its service area in 2023, [1] which spans the Tri-Cities metropolitan area except for Richland, which retains a city library: West Richland, Kennewick, and Pasco, and surrounding Benton, Franklin, and parts of Adams Counties are part of Mid-Columbia. It was founded in 1949, originally to serve patrons in unincorporated parts of the counties. [2]
As of 2025 [update] , the cities of Kennewick, Benton City, Connell, Mesa, and Kahlotus have annexed into the district, while Pasco, West Richland, and Prosser have contracts with the district. [3] In 2025, Mid-Columbia Libraries entered into a reciprocal borrowing agreement with the Richland Public Library, Walla Walla County Rural Library District, Walla Walla Public Library, and Columbia County Rural Library District. [4]
