Texas’ population swelled so much from 2010 to 2020 that it essentially swallowed a state the size of — gasp! — Oklahoma.

Figures released April 26 by the U.S. Census Bureau show Texas gained 3,999,944 residents from April 2010 to April 2020. By comparison, the entire population of Oklahoma totaled 3,959,353 in April 2020. Those nearly 4 million new residents brought Texas’ population to 29,145,505 as of April 2020.

Buoyed by a spike in the Hispanic population and an influx of out-of-state and international arrivals, Texas led the nation for the sheer number of residents added from the every-10-years headcount in 2010 to the headcount in 2020. Florida ranked second in that category (2,736,877), and California ranked third (2,284,267).

“The growth for Texas was a little bit slower than expected, which may be a function of lower fertility rates post-Great Recession and slower international migration,” Lloyd Potter, the Texas state demographer, tells CultureMap.

California still remains the biggest state as measured by population (39,538,223). However, the Quartz news website reported in 2019 that Texas’ population could surpass California’s by 2045.

Meanwhile, Texas holds the No. 3 position for percentage population growth from 2010 to 2020, according to Census Bureau data. The state’s population shot up by 15.9 percent during that period, behind only Utah (18.4 percent) and Idaho (17.3 percent). By contrast, California saw its population climb by just 6.1 percent from 2010 to 2020.

As a result of population shifts across the country, Texas will pick up two seats in the U.S. House, bringing its total to 38, the Census Bureau says. Five states will add one seat each: Colorado, Florida, Montana, North Carolina, and Oregon. Seven states will lose one seat each: California, Illinois, Michigan, New York, Ohio, Pennsylvania, and West Virginia.

Based on earlier population estimates, experts had expected Texas to tack on three congressional seats following the 2020 Census. But Potter says Texas’ growth relative to population changes in other states pared the Lone Star State’s final tally to two more seats.