Welcome to the HomePage for the Colusa County Free Library You are our Visitor! http://nscls.library.net Click Here To Search Library Locations: Main Library 738 Market Street, Colusa CA 95932; Phone (530) 458-7671. The library is open on Mondays and Wednesdays from 10AM to 5PM, Tuesdays and Thursdays from 10AM to 8PM. You can also reach the library administrator by sending email to Susan ...