Beginning Feb. 8, 2021, we are open for curbside pickup and returns and limited computer use. Hours for high risk customers are available. Please call us for details. / A partir del 8 de febrero del 2021, estaremos abiertos para recoger y devolver en la acera y para el uso limitado de la computadora. Hay horarios disponibles para clientes de alto riesgo. Por favor llámenos para más detalles.

Branch Details: 

902 7th St.
Prosser, WA 99350

(509) 786-2533
11 am - 7 pm
11 am - 7 pm
11 am - 7 pm
11 am - 7 pm
11 am - 7 pm
10 am - 3 pm
Katy McLaughlin

The Mid-Columbia Libraries' Prosser Branch offers free wi-fi and curbside pickup service. Get up to five free pages printed daily using our print drop service.

The City of Prosser Library building was built in 1973, and Benton County residents were served by a Bookmobile and then a branch also located in Prosser. In 2001, the city contracted with the county library system to combine services as the Mid-Columbia Libraries' Prosser Branch. The branch was completely remodeled in 2015.

Please contact the library if you are interested in becoming a Friend or donating items, or email The board meets bi-monthly, and meetings will be listed on the library events calendar.

The Prosser Heritage Collection showcases historical photos from the Prosser area, developed with support from a grant from the Washington State Library and assistance from the Benton County Historical Museum.