9th Fastest Growing City out of 150 in North Texas; North Texas is the 4th largest and fastest growing region in the United States; Labor Force in Collin County amounts to over 500,000; Anna 2021 Population estimate: 16,925 (105% increase since 2010); 833 housing permits issued in 2020, 1,500 estimated for 2021; $95,000 Median Household Incomes; Weekday Trade Area Population of 109,426.