Austin area population growth for 2019 among highest in U.S., according to Marcus & Millichap commercial real estate services. For the ninth year in a row it’s predicted that the Austin metro area will surpass 50,000 residents. Of those new residents, expect more than 13,000 to be millennials. Ryan Robinson, the City of Austin’s demographer, aligns with the Marcus & Millichap projection. Robinson predicts the area’s population will rise 2.75 percent in 2019 compared with 2018.