At the 2010 census count, the city of Hutto had a population of 14,698. Nearly a decade later, 27,947 people call Hutto home, according to data released by the U.S. Census Bureau late May 20. This represents a 90.1% increase. The city of Hutto has projected that the city's population could grow to more than 85,000 people in 2040, based on historical residential permit patterns.

Hutto is located in Williamson County. The county, too, has seen substantial population growth since 2010.

According to the census data released May 20, 205,609 resided in Williamson County's in 2019, up from 162,773 in 2010. This represents a 26.3% increase.