Jefferson County Library Foundation AssociationsNon Profit, Civic Organization, Foundation Jefferson County Library Foundation Visit Website Request Info 10790 W. 50th Ave. Suite 200 Wheat Ridge, CO 80033 303-403-5075 Hours: Monday through Friday, 8:30am - 5:00pm. About Map About The 501c3 responsible for public fundraising for the programs of Jefferson County Public Library. What's Nearby? Distance: 5 10 15 20 25 50 mi.