[2] Bryan County is part of the Savannah, Georgia metropolitan statistical area.

The colonial town of Hardwick, laid out in 1755, served as the initial county seat.

In 1797, the Georgia General Assembly moved the county seat to Cross Roads near modern Richmond Hil.

[5] A triangular area in the northeast of Bryan County, from northwest of Pembroke to north of Richmond Hill, is located in the Lower Ogeechee River sub-basin of the Ogeechee River basin, as is the northern half of the remaining area in the county south of Richmond Hill.

Fort Stewart has the Department of Defense Education Activity (DoDEA) as its local school district,[18] for the elementary level.