Gwinnett County is located in the north central portion of the U.S. state of Georgia. It forms part of the Atlanta metropolitan area. In 2020, the population was 957,062, making it the second-most populous county in Georgia (after Fulton County). Its county seat is Lawrenceville. The county is named for Button Gwinnett, one of the signatories of the Declaration of Independence.
In 1813, Fort Daniel was created during the War of 1812 in territory that would become Gwinnett County. The county was 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 Creek Indian lands. Named for Button Gwinnett, one of the signatories of the Declaration of Independence, the first county election was held at the home of Elisha Winn, and the first Superior Court was held in his barn. The county seat was later placed at Lawrenceville.