Population loss like Sheffield's is happening in small towns across the U.S. "The big picture for all rural communities that don't have a connection to a growing metro area is that they are going to get smaller over time," says Kimberly Zarecor, associate professor of architecture at Iowa State University. Zarecor argues that towns like Sheffield shouldn't spend money trying to lure new residents to shore up their population numbers. She says instead, they should focus on making life better for the residents they still have. In fact, she's devoting a lot of her energy to the cause she calls "The Shrink Smart Project." Peters says they're conducting surveys to figure out how some remote small towns are already making residents' life better, even as their populations drain away. He says there are some standouts — such as Sac City, Iowa, whose population is estimated at 2,105 and falling. The numbers are down by a third since a farm equipment manufacturer closed its factory there in the 1980s.