Americans who are looking for a deal on an apartment might want to check out Ohio. The state has two cities with with the least expensive zip codes in the U.S., according to ApartmentGuide.com. A one-bedroom apartment in Columbus, Ohio, costs $489 a month. It's the only zip code on the list that's under $500. Rogers, Arkansas, and Greenville, Texas, were tied for second least expensive, with monthly rents costing $510. Cities like Oklahoma City, Champaign, Illinois, and Shreveport, Louisiana, cost under $550 per month. Conway, Arkansas, fell in the middle of the last with $555 per month for a one-bedroom apartment and Amarillo, Texas, Derby, Kansas, and Youngstown, Ohio, finished off the least expensive zip codes by costing renters about $600 per month.