Mogumna is a townland located in the Barony of Banagh, within the Civil Parish of Killybegs Lower and the Electoral Division of Mulmosog, County Donegal.

It spans an area of 819,344 square metres, which equates to approximately 0.32 square miles or 202 acres.

Mogumna shares its borders with Ardvally, Drumbaran, and Woodhill to the north, Edergole to the west, Cashel to the south, and Mogumna Mountain and Mullanacloy to the east.