| Official Name: | Appin |
| Gaelic Name: | An Apainn |
| Country: | Scotland |
| Edinburgh Distance: | 133 miles |
| London Distance: | 510 miles |
| Coordinates: | 56.5622°N -5.3589°W |
| Post Town: | Appin |
| Postcode Area: | PA |
| Postcode District: | PA38 |
| Constituency Westminster: | Argyll and Bute |
| Unitary Scotland: | Argyll and Bute |
| Constituency Scottish Parliament: | Argyll and Bute |
| Static Image Name: | Appin Village.jpg |
| Static Image Width: | 270 |
| Static Image Caption: | Appin village, at the seaward end of the Strath of Appin |
Appin (gd|An Apainn) is a coastal district of the Scottish West Highlands bounded to the west by Loch Linnhe, to the south by Loch Creran, to the east by the districts of Benderloch and Lorne, and to the north by Loch Leven. It lies northeast to southwest, and measures 14by. The name, meaning "abbey land", in reference to Lismore Abbey, is derived from the Middle Irish apdaine.[1]
The district is mainly in Argyll and Bute, with a coastal strip to the north, along Loch Leven, within the Highland council area.
The scenery of the district is a combination of seascapes with rugged and mountainous country inland. Appin forms part of the Lynn of Lorn National Scenic Area, one of 40 in Scotland.[2] The principal hills are double peaks of Beinn a' Bheithir –, respectively – and Creag Ghorm – – in the north, and Fraochaidh, Meall Bàn and Beinn Mhic na Cèisich near the western flank of Glen Creran. The chief rivers are the Coe and Laroch, flowing into Loch Leven, the Duror and Salachan flowing into Loch Linnhe, and the Iola and Creran flowing into Loch Creran.
The leading industries are forestry and tourism, with lead mining and slate quarrying being of former importance, but the Glensanda superquarry, in Morvern on the opposite bank of Loch Linnhe also provides local employment. Ballachulish, Duror, Portnacroish, Appin Village and Port Appin are the principal villages.
Appin was the country of a distinct local branch of Clan Stewart.
The A828 road runs along the coast of Appin. A passenger-only ferry to the island of Lismore runs from Port Appin. The district formerly had a railway, but the Caledonian Railway company's branch line from Connel to Ballachulish was closed in 1966.
Appin is where the Appin Murder took place in 1752.