Our phone number is (515)-332-1925. The Humboldt Public Library is located at 30 6th St. N. in Humboldt. We’re located just north of the Humboldt Post Office, which sits on the corner of Sumner Ave. and 6th St. N. We are an Andrew Carnegie library, which was established in 1908 and has expanded in recent years. Our experienced, friendly and willing staff is here to support all of your reading and media needs. Please stop in and see us today!