As the 2020 U.S. Census rolls out across the nation, the U.S. Census Bureau released its July 1, 2019, population estimates March 26. The data showed that Harris County remains Texas' most populous county and its fastest-growing county. It is followed by Collin County and Denton County for fastest-growing county in the state.

Nationwide, Harris County is the third-most populous county. Los Angeles County in California still sits in the No. 1 spot, and Cook County in Illinois takes the second.

Census data also showed that Harris County is one of the fastest-growing counties in the U.S year over year. The county's population increased by 33,280 between July 1, 2018, and July 1, 2019, from 4.68 million to 4.71 million people—making it the third-fastest-growing county in the nation. Harris County trails Maricopa County in Arizona, which saw population growth of 83,011, and Clark County in Nevada, which saw a 40,600-person increase.

Meanwhile, Dallas-Fort Worth-Arlington remains the fastest-growing metropolitan area from 2018-19, with an increase of 117,380 residents. It is followed by the Phoenix-Mesa-Chandler area in second and the Houston-The Woodlands-Sugar Land area in third.

The Census Bureau will continue to release July 2019 data throughout the year, including information on age, sex, race and Hispanic origin, according to the news release. Find more highlights from this year’s report at www.census.gov.