Gowlagh South is bounded on the north by Mullaghmore, Templeport townland, on the west by Owengallees townland, on the south by Boley, Templeport and Gortaclogher townlands and on the east by Cloncurkney townland. Its chief geographical features are the River Blackwater, County Cavan, bogs and spring wells. It is called Gowlagh South to distinguish it from Gowlagh North townland at the foot of Slieve Rushen mountain, with which it has no connection. Gowlagh South is traversed by the L1037 road, minor public roads and rural lanes. The townland covers 165 statute acres.