| Gwinnett County is a county located in the U.S. state of Georgia. It was created on December 15, 1818. As of the 2000 census, the population is 588,448. The 2006 Census Estimate placed the population at 757,104. It is estimated to be the 9th fastest growing county in the country in terms of numeral increase. The county seat is Lawrenceville. |