John o' Groats (Scottish Gaelic: Taigh Iain Ghròt) is a village 2.5 mi (4 km) northeast of Canisbay, Caithness, in the far north of Scotland. John o' Groats lies on Great Britain's northeastern tip, and is popular with tourists as the most distant point on the mainland from Land's End in Cornwall, 876 mi (1,410 km) to the southwest. The northernmost point of mainland Great Britain is nearby Dunnet Head.

John o' Groats is 690 mi (1,110 km) from London, 280 mi (450 km) from Edinburgh, 6 mi (10 km) from the Orkney Isles, and 2,200 mi (3,500 km) from the North Pole. It is 4+1⁄4 mi (6.8 km) from the uninhabited Island of Stroma.

In summer, a ferry operates between John o' Groats and Burwick on South Ronaldsay in Orkney.