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Gwinnett County, Georgia facts for kids

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Gwinnett County, Georgia
Map of Georgia highlighting Gwinnett County
Location in the state of Georgia
Map of the USA highlighting Georgia
Georgia's location in the U.S.
Founded December 15, 1818
Seat Lawrenceville
Largest City Peachtree Corners
 - Total
 - Land
 - Water

437 sq mi (1,132 km²)
430 sq mi (1,114 km²)
6.4 sq mi (17 km²), 1.5%
 - (2015)
 - Density

1,871/sq mi (722/km²)
Time zone Eastern: UTC-5/-4
Named for: Button Gwinnett

Gwinnett County is a county in the north central portion of the U.S. state of Georgia. As of the 2010 census, the population was 859,304, making it the second-most populous county in Georgia. Its county seat is Lawrenceville. The county is named for Button Gwinnett, one of the signers of the Declaration of Independence.

Gwinnett County is included in the Atlanta-Sandy Springs-Roswell, GA Metropolitan Statistical Area.


Created in 1818 by an act of the Georgia General Assembly, Gwinnett County was formed from parts of Jackson County (formerly part of Franklin County) and from lands gained through the cession of Indian lands. Named for Button Gwinnett, one of the signatories of the Declaration of Independence, the first county court was held at the home of Elisha Winn, and the county seat was placed at Lawrenceville.

In 1861, all three of Gwinnett County’s representatives at the Georgia Constitutional Convention (1861) in Milledgeville voted against secession. Towards the end of the war, several skirmishes took place in Gwinnett County as part of the Atlanta Campaign.

The northeastern part of Gwinnett County was removed to form a part of the new Barrow County in 1914.


Elisha Winn House
The Elisha Winn House served as Gwinnett County's first courthouse

According to the U.S. Census Bureau, the county has a total area of 437 square miles (1,130 km2), of which 430 square miles (1,100 km2) is land and 6.4 square miles (17 km2) (1.5%) is water.

It is located along the Eastern Continental Divide. A portion of the county to the northwest is a part of the Chattahoochee River National Recreation Area chain.

The regional reservoir, Lake Lanier, at the extreme north of the county, is the central cause to the Tri-state water dispute.

The southern and central portions of Gwinnett County are located in the Upper Ocmulgee River sub-basin of the Altamaha River basin. Most the county's northern edge, from south of Peachtree Corners to north of Buford, is located in the Upper Chattahoochee River sub-basin of the ACF River Basin (Apalachicola-Chattahoochee-Flint River Basin), while the county's eastern edge, north and south of Dacula, is located in the Upper Oconee River sub-basin of the same Altamaha River basin.

Adjacent counties



The county maintains a regional airport under the name Gwinnett County Airport, formerly, Briscoe Field.

Major highways

  • I-85.svg Interstate 85
  • I-985.svg Interstate 985
  • US 23.svg U.S. Route 23
  • US 29.svg U.S. Route 29
  • US 78.svg U.S. Route 78
  • Georgia 8.svg State Route 8
  • Georgia 10.svg State Route 10
  • Georgia 13.svg State Route 13
  • Georgia 20.svg State Route 20
  • Georgia 84.svg State Route 84
  • Georgia 120.svg State Route 120
  • Georgia 124.svg State Route 124
  • Georgia 140.svg State Route 140
  • Georgia 141.svg State Route 141
  • Georgia 264.svg State Route 264
  • Georgia 316.svg State Route 316
  • Georgia 317.svg State Route 317
  • Georgia 324.svg State Route 324
  • Georgia 347.svg State Route 347
  • Georgia 365.svg State Route 365
  • Georgia 378.svg State Route 378
  • Georgia 403.svg State Route 403 (unsigned designation for I-85)
  • Georgia 419.svg State Route 419 (unsigned designation for I-985)

Ronald Reagan Parkway

Transit Systems

  • Xpress GA/ RTA Commuter buses and Gwinnett County Transit serve the county.


Historical population
Census Pop.
1820 4,589
1830 13,289 189.6%
1840 10,804 −18.7%
1850 11,257 4.2%
1860 12,940 15.0%
1870 12,431 −3.9%
1880 19,531 57.1%
1890 19,899 1.9%
1900 25,585 28.6%
1910 28,824 12.7%
1920 30,327 5.2%
1930 27,853 −8.2%
1940 29,087 4.4%
1950 32,320 11.1%
1960 43,541 34.7%
1970 72,349 66.2%
1980 166,903 130.7%
1990 352,910 111.4%
2000 588,448 66.7%
2010 805,321 36.9%
Est. 2015 895,823 11.2%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2013

As of the 2010 United States Census, there were 805,321 people, 268,519 households, and 203,238 families residing in the county. The population density was 1,871.2 inhabitants per square mile (722.5/km2). There were 291,547 housing units at an average density of 677.4 per square mile (261.5/km2). The racial makeup of the county was 53.3% White, 23.6% black or African American, 10.6% Asian, 0.5% American Indian, 0.1% Pacific Islander, 8.8% from other races, and 3.1% from two or more races. Those of Hispanic or Latino origin made up 20.1% of the population. In terms of ancestry, 8.3% were German, 7.8% were Irish, 7.7% were English, and 5.8% were American.

Of the 268,519 households, 45.6% had children under the age of 18 living with them, 56.2% were married couples living together, 14.2% had a female householder with no husband present, 24.3% were non-families, and 19.1% of all households were made up of individuals. The average household size was 2.98 and the average family size was 3.40. The median age was 33.7 years.

The median income for a household in the county was $63,219 and the median income for a family was $70,767. Males had a median income of $48,671 versus $39,540 for females. The per capita income for the county was $26,901. About 8.7% of families and 11.0% of the population were below the poverty line, including 15.1% of those under age 18 and 8.1% of those age 65 or over.




Census-designated places

  • Mountain Park

Unincorporated communities


The rap group Migos hails from Gwinnett County. Migos won the 2015 YouTube Music Award, as well as several other notable entertainment television awards. Net worth in 2015 was reported to be 4.2 million (USD).

Strange Music artist Rittz also hails from Gwinnett County.

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