DES MOINES, Iowa (AP) – Nearly two-thirds of Iowa’s counties lost population between 2011 and 2012 even as the state gained 10,089 overall. The latest U.S. Census estimates show that Iowa had 3,074,186 residents last year, but the population of 65 of the state’s 99 counties declined between 2011 and 2012.

Many of the population declines were in rural areas where aging populations are dying off while younger residents move to urban areas in search of work. Fifty-five Iowa counties had more deaths than births in 2012.

The biggest population gains in the state were reported in Polk, Johnson, Dallas, Scott and Linn counties, which are home to Des Moines, Iowa City, Davenport and Cedar Rapids.