Mid-Columbia Libraries

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 1948, originally to serve patrons in unincorporated parts of the counties.^[2]

Key Information

Mid-Columbia Libraries
46°12′13″N 119°9′33″W / 46.20361°N 119.15917°W / 46.20361; -119.15917
Location	Tri-Cities metropolitan area, Eastern Washington, U.S.
Type	Public library
Established	1948
Branches	12
Collection
Size	566,758
Access and use
Circulation	2.4 million
Population served	270,125
Other information
Website	midcolumbialibraries.org
References: Washington Public Library Statistical Report, 2023[1]
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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]

• Official website

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