10. Iowa City, Iowa — Iowa City boasts the highest share of singles on our list. Attribute that statistic to the sprawling University of Iowa, which enrolls nearly 31,000 undergraduate, graduate and professional students. But a strong economy and pleasant lifestyle draw newcomers to Iowa City, as well: Pearson, Oral B and Procter & Gamble all operate facilities in the area, income growth is a solid 3.8%, and unemployment is 4.3%. Moderate midwestern living costs mean that both residing and dating in Iowa City are comfortably cheap.