Kildonan (Scottish Gaelic: Cill Donnain) is a village on the south coast of the Isle of Arran in the Firth of Clyde, Scotland.

Once a royal seat, the castle passed hands between various Scottish nobles, before latterly belonging to the Hamilton family in 1544, by which time they were the Earls of Arran.

The modern village originated from a few small buildings in the district, with the majority of local people engaged in farming.

Schoolchildren from the village now attend the primary school in Whiting Bay, which is a few miles north, being ferried there and back each day by bus.

Kildonan was previously the site of the only coastguard station on Arran, but this was closed in 1981 when operations were transferred to Lamlash.