Bloomingdale is a city in Chatham County, Georgia, United States. As of the 2020 census, the city had a population of 2,790. It is part of the Savannah Metropolitan Statistical Area.

Bloomingdale is located along the northwestern border of Chatham County at 32°7′27″N 81°18′26″W (32.124122, -81.307211). It is bordered to the northeast by Port Wentworth, to the east by Pooler, to the south by a western portion of Savannah, and to the northwest by Effingham County. U.S. Route 80 runs east–west through the center of Bloomingdale, and Interstate 16 runs parallel to it through the southern part of the city, with access from Exit 152. Both highways lead east 13 miles (21 km) to downtown Savannah.

According to the United States Census Bureau, Bloomingdale has a total area of 14.0 square miles (36.3 km2), of which 12.8 square miles (33.1 km2) is land and 1.2 square miles (3.2 km2), or 8.90%, is water.