Inch Fort, Lough Swilly, Inishowen, County Donegal was built between 1812 and 1813, during the Napoleonic Wars.

During the 1880s a scheme to strengthen the defences in Lough Swilly was put into effect.

By 1893 Inch Fort had been rearmed with two 6-inch guns on hydropneumatic carriages.

Following recommendations of the Owen Committee in 1905, the guns were deemed surplus and the fort was disarmed and abandoned.

[3][4] Today the site includes the two 6-inch gun positions and associated magazines, but the Napoleonic blockhouse was mostly demolished during the 1890s remodelling.