Highest Black population share, US counties · 1990
US counties ranked by the share of all residents who are Black or African American (1990 American Community Survey). A concentration measure: Black residents as a percentage of total population. Jefferson County, Mississippi leads at 86.1%. 3,122 counties qualify in total. Mississippi carries 10 of the top 25 entries.
UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS
Frequently asked
Which county has the highest black?
Jefferson County, Mississippi ranks #1 with 86.1% (1990 Decennial Census).
What are the top 5 counties by black?
Jefferson County, Mississippi, Macon County, Alabama, Claiborne County, Mississippi, Greene County, Alabama, Hancock County, Georgia.
How many counties are in this ranking?
3,122 counties qualify after filtering for population minimums and data availability. The ranking covers 1990 Decennial Census data.
How is black measured?
Share identifying as Black or African American alone. Source: US Census Bureau, 1990 Decennial Census.