2021 Census county population estimates.

[Minnesota Mike]

https://www.census.gov/newsroom/press-releases/2022/population-estimates-counties-decrease.html

[Minnesota Mike]

Five of the top 10 largest-gaining counties in 2021, were in Texas. Collin, Fort Bend, Williamson, Denton and Montgomery counties gained a combined 145,663 residents.
Los Angeles County, California experienced the largest population loss of any county, losing 159,621 residents in 2021.
Seventy-one percent of counties (2,218) experienced positive net international migration.
Four counties crossed the threshold of 100,000 residents in 2021—Cleveland County, North Carolina (100,359), Lancaster County, South Carolina (100,336), Bastrop County, Texas (102,058), and Grant County, Washington (100,297).
Los Angeles County, California (9,829,544) and Cook County, Illinois (5,173,146), had more than 5 million residents in 2021, making them the top two most populous counties in the nation.

[Minnesota Mike]

The NYC counties, Los Angeles, Cook, and San Francisco counties all had huge drops in population. COVID, housing prices and crime have people fleeing the big cities.

[kwabbit]

Interesting to see, but I'm a little doubtful previously growing cities lost significant amounts of population. NY, LA, or Chicago? Yeah I understand that. But Dallas County I doubt has lost population. The census estimates missed most cities in 2020, and they could being doing that again.