Coaling is located at(33.169442, -87.345859).
According to the U.S. Census Bureau, the city had a total area of 3.7 square miles (9.6 km2), of which, 3.7 square miles (9.6 km2) of it is land and 0.1 square miles (0.26 km2) of it (1.61%) is water.
The city employs three police officers.
April 27, 2011, parts of Coaling were devastated by an EF-3 tornado around 5:15 a.m. Three homes were completely destroyed, at least ten others were severely damaged, and twice as many more sustained light damage. Though there were no fatalities, few residents were hospitalized for injuries sustained that morning.