Henry County is a county located in the north central portion of the U.S. state of Georgia. Per the 2010 census, the population of Henry County is 203,922. The county seat is McDonough. The county was named for Patrick Henry.
Henry County is part of the Atlanta-Sandy Springs-Roswell, GA metropolitan statistical area. It is home to the Atlanta Motor Speedway in Hampton.
The vast majority of Henry County is located in the Upper Ocmulgee River sub-basin of the Altamaha River basin, with just a very small western corner, west of Hampton, located in the Upper Flint River sub-basin of the ACF River Basin (Apalachicola-Chattahoochee-Flint River Basin).