[2] Barrow County is included in the Atlanta–Sandy Springs–Roswell metropolitan statistical area.

[5] At the 2020 United States census, there were 83,505 people,[18] 27,765 households, and 20,948 families residing in the county.

Barrow County is considered a part of the Atlanta, GA combined statistical area despite its comparatively small population.

In 2010, the racial and ethnic makeup of the county was 78.8% White, 11.4% Black or African American, 3.4% Asian, 0.3% American Indian, 0.1% Pacific islander, 3.7% from other races, and 2.3% from two or more races.

[21] By the 2020 census, its racial and ethnic makeup was 66.56% non-Hispanic white, 12.14% Black or African American, 0.16% American Indian or Alaska Native; 0.16 % Asian, 0.02% Pacific Islander, 0.55% some other race, 4.05% multiracial, and 12.65% Hispanic or Latino of any race.