The Atlanta region population grew by 60,300 people between 2014 and 2015 to a total of 4,332,600 residents in 2015. Gwinnett County had the largest growth over this period, adding 15,700 new residents. While population growth has rebounded since 2010, the annual growth rate remains below historical levels from 1990 to 2010. Residential building permits, a key indicator of future population growth, have also remained well below their 30-year average of 35,000 permits per year. Areas with high concentrations of new residential building permits, especially single family homes, correspond to areas experiencing the greatest population increases per square mile between 2010 and 2015.