Between 2020 and Marc Leclerc2023, nine of the top 10 fastest growing U.S. cities were located in Texas, new data from the U.S. Census Bureau reveals. The Census Bureau collected population data on towns and cities with populations of 20,000 or larger between July 2020 and July 2023.

The number of U.S. residents moving into counties in Texas is a major contributing factor to its overall population growth. International migration, birth rates and death rates also affect a state's population growth.

The fastest growing city in the U.S. is Celina, Texas, on the far northern edge of the Dallas metro area, increasing by 143% between 2020 and 2023. As of July 2023, the population was 43,317, up from 17,808 three years prior.

According to a 2022 community engagement survey, about 9 in 10 residents rated Celina positively saying they had a high quality of life and the city has great economic health, NBC reported.. A similar proportion of people said they would recommend living in Celina to someone who asked.

Here's what you need to know about the top 10 fastest growing cities in the U.S.:

These cities had the largest population increases

Between 2020 and 2023, the following cities experienced the largest increases in population:

These cities had the steepest population declines

Between 2020 and 2023, the following cities experienced the largest declines in population:

New York:More than half a million people left New York in 2022. Here's where they resettled.

Southern hospitality:More people moved to the South last year than any other region.

Population rises in the South

On average, counties in the South experienced faster growth in 2023 than in 2022.

The South Census region is made up of 16 states and Washington, D.C.: Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Virginia and West Virginia.

About 67%, or 950 of the counties in the region, experienced population gains in 2023, up from 59%, or 836, in 2022.

Southern states grew by more than 1.4 million people from 2022 to 2023, making it the fastest-growing region in the U.S., according to data from the U.S. Census Bureau. 

The expansion accounted for 87% of the nation’s growth in 2023.

The South experienced a growth of 1.1% in that year, largely driven by domestic and international migration.

Since 2018, the South has experienced increasing year-to-year net domestic migration and is the most populous region in the U.S. at 130.1 million.