Hours for: Mason City Public Library Day Open Close MON 9:00 AM 7:00 PM TUE 9:00 AM 7:00 PM WED 9:00 AM 7:00 PM THU 9:00 AM 7:00 PM FRI 9:00 AM 5:00 PM SAT 9:00 AM 5:00 PM SUN CLOSED Location Information 225 2nd Street SE Mason City, IA 50401 641-421-3668