Government go Results Found: 7 Button group with nested dropdown United States Senate United States Senate U. S. Capitol Washington DC 20510 (202) 224-3744 United States House of Representative... United States House of Representatives U. S. Capitol Washington DC 20510 State of Iowa State of Iowa State Capitol Building 200 East Grand Avenue Des Moines IA 50319 (515) 281-5011 Iowa State University Extension 601 S. Illinois Avenue Mason City IA 50401 (641) 423-0844 City of Ventura 101 Sena Street Ventura IA 50482 (641) 829-3861 City of Clear Lake 15 North 6th Street P. O. Box 185 Clear Lake IA 50428 (641) 357-5267 Cerro Gordo County/CG Public Health Cerro Gordo County/CG Public Health Cerro Gordo County Courthouse 220 North Washington Avenue Mason City IA 50401 (641) 421-3023