Iowa (USA) is 37% larger than Ohio (USA).
Area: 144,669 km2 US Census
Population: 3,090,416 (July 2013) US Census
Iowa is a U.S. state in the Midwestern United States, a region sometimes called the "American Heartland". Wikipedia
Area: 105,829 km2 US Census
Population: 11,570,808 (July 2013) US Census
Ohio is a state in the Midwestern United States. Ohio is the 34th largest, the 7th most populous, and the 10th most densely populated of the 50 United States. The state's capital and largest city is Columbus. Wikipedia