Mason City Public Library Loading Map.... Mason City Public Library225 2nd St SE - Mason CityEvents 43.1490179 -93.19734629999999 Address 225 2nd St SE Mason City IA Cerro Gordo 50401 United States Upcoming Events No events in this location mariekboyd2019-08-22T09:59:32-05:00August 22nd, 2019| Share This Story, Choose Your Platform! FacebookXRedditLinkedInTumblrPinterestVkEmail