Lerwick
Lerwick, Shetland Islands, Scotland is the most northerly town in the UK. John O' Groats is the most northerly town on mainland Great Britain, whilst Dunnet Head is the most northerly point on mainland Great Britain.
The most northerly county in Scotland is Caithness.
Mainland: Ardnamurchan - Islands: St Kilda
The most northerly county on the mainland of Scotland is Caithness.
On the mainland it is Thurso. If you include the Shetland Islands it will be Lerwick.
The northern most part of the mainland. On the most northwestern side of the Continent.
The city of more than 10 000 inhabitants that is most northerly and on continental mainland is Alta in Norway (if you consider the Scandinavian peninsula mainland) it is at 69°58′N 23°17′E.
That depends on where you are measuring from. The most northerly point on mainland Scotland is Dunnet head, but if you include the islands it's Out Stack, Shetland.
Herma Ness in the Shetland Islands. If you mean on mainland Britain, it is Dunnet Head in the north of Scotland.
Northern Scotland
The most northerly part of the British Isles is Norwick on the Island of Unst, the most northerly of the Shetland Islands. On mainland Scotland (or mainland Great Britain) the most northerly point is Dunnet Head, not as is commonly thought John O'Groats. In the same way the most Southerly point is The Lizard, not Lands End. Perhaps the myths about both are perpetuated by the company that owns both sites!
After incursions into Scotland, Hadrian's Wall.