Dallas Population 2017. Dallas, located in North Texas, is the 9th largest city in the United States and the 3rd largest in Texas. Dallas recently rated as a beta plus world city. The current population of Dallas in 2016 is estimated at 1.3 million, a growth from the 1.28 million estimate in 2014. In 2010, Dallas had an official population of 1.197 million people. This grew to an estimated 1.24 million in 2012, and 1.28 million in 2014.