Most population lost, US counties · 2020
US counties that lost the most residents from the 2010 census to 2020, by raw count of people rather than percentage. Baltimore, Maryland leads at -35,253. 3,131 counties qualify in total. Ohio carries 4 of the top 25 entries.
Flip the list · Most population gained, US counties →UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS
Frequently asked
Which county has the lowest population change?
Baltimore, Maryland ranks #1 with -35,253 (2020 Decennial Census).
What are the top 5 counties by population change?
Baltimore, Maryland, Wayne County, Michigan, Genesee County, Michigan, St. Louis, Missouri, Robeson County, North Carolina.
How many counties are in this ranking?
3,131 counties qualify after filtering for population minimums and data availability. The ranking covers 2020 Decennial Census data.
How is population change measured?
Change in the number of residents from the prior decennial census (raw count, not a percentage). Source: US Census Bureau, 2020 Decennial Census.