Adjacent counties / independent city

• Brunswick County, Virginia – west
• Dinwiddie County, Virginia – north
• Sussex County, Virginia – northeast
• Southampton County, Virginia – east
• Northampton County, North Carolina – south
• Emporia, Virginia – surrounded by Greensville County

Major highways

• I-95, the major north–south highway on the Eastern Seaboard enters Greensville County from North Carolina. Access to the county is available at Exits 4, 8, 11 (if you include Emporia) 12, and 13 before the road crosses the Greensville-Sussex County Line.
• US 58, the principal west–east route through southern Virginia at large, including Greensville County. The road connects the Cumberland Gap area of Tennessee to the Hampton Roads area, entering the county from Brunswick County and leaving at Southampton County. A Business Route of US 58 exists within Emporia.
• US 301, the principal south–north route Greensville County and Emporia until it was supplanted by I-95. A spur of US Route 1, it enters Greensville County from North Carolina, serves as a major boulevard in Historic Emporia, and leaves at Sussex County south of Jarratt.
• SR 139, a state spur route running northwest of US 301 from through Jarratt both in Greensville and Sussex Counties.
• SR 186, a state route briefly entering Greensville County from North Carolina, only to cross into Southampton County at the bridge over the Meherrin River.

2020 census

2010 census

As of the 2010 United States Census, there were 12,243 people living in the county. 59.8% were Black or African American, 38.5% White, 0.3% Asian, 0.2% Native American, 0.3% of some other race and 0.8% of two or more races. 1.4% were Hispanic or Latino (of any race).

As of the census^[12] of 2000, there were 11,560 people, 3,375 households, and 2,396 families living in the county. The population density was 39 people per square mile (15 people/km²). There were 3,765 housing units at an average density of 13 units per square mile (5.0 units/km²). The racial makeup of the county was 59.75% Black or African American, 38.94% White, 0.10% Native American, 0.40% Asian, 0.02% Pacific Islander, 0.47% from other races, and 0.32% from two or more races. 0.93% of the population were Hispanic or Latino of any race.

There were 3,375 households, out of which 29.30% had children under the age of 18 living with them, 49.80% were married couples living together, 16.00% had a female householder with no husband present, and 29.00% were non-families. 25.40% of all households were made up of individuals, and 11.30% had someone living alone who was 65 years of age or older. The average household size was 2.51 and the average family size was 2.99.

In the county, the population was spread out, with 18.20% under the age of 18, 7.40% from 18 to 24, 38.70% from 25 to 44, 24.20% from 45 to 64, and 11.40% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 160.90 males. For every 100 females aged 18 and over, there were 177.80 males.

The median income for a household in the county was $32,002, and the median income for a family was $38,810. Males had a median income of $24,919 versus $19,849 for females. The per capita income for the county was $14,632. 14.70% of the population and 12.40% of families were below the poverty line. Out of the total people living in poverty, 17.00% are under the age of 18 and 18.60% are 65 or older.

Town

• Jarratt (partially in Sussex County)

Unincorporated communities

• Brink
• Durand
• Low Ground
• Moonlight
• Purdy
• Radium
• Skippers