Texas remains one of the fastest growing states in the U.S. Between 1982 and 2017, its population grew by 13 million, almost doubling over a 35-year span. During that same time, Texas lost 6,634 square miles of open space. About 4,644 square miles, 70% of total lost open space, were developed due to population growth. Immigration accounted for 47% of population increase in the Lone Star State.