Carnwath (Gaelic: A' Chathair Nuadh; English: "New Fort") is a moorland village on the southern edge of the Pentland Hills of South Lanarkshire, Scotland.

Carnwath stands about a mile north of the old Roman road connecting forts in Tweeddale with those on the Clyde.

[2] The former castle of Carnwath is believed to date to the mid 12th-century built under the orders of William de Sommerville (who died 1160).

[3] However, the only remains are the motte which is visible beside the Carnwath Golf Club (founded 1907), at the west end of the village.

[6] In 1869, a new parish church was built beside the earlier buildings to a design by the Scottish architect David Bryce.

The Ordnance Gazetteer of Scotland (1882–1885) said the village was: "Long a dingy and disagreeable place, it has been greatly improved".

Other buildings of note in the village include the old primary school on Main Street, dated 1876 and abandoned since 2006.

[10] There is a large production facility to the NE of the village belonging to BHC Building Merchants.

Each year a foot race is run at Carnwath and the local Laird must provide a pair of red stockings as the prize.

And:- So whenever friendly friens may meet, Wherever Scots foregather, We'll raise our gless, we'll shout Hurroo, It's Carnwath Mill for ever.

Notable people from Carnwath include the first woman provost of Kirkintilloch, Jenny Coutts, the author and critic, Robert Anderson and the footballer, Tom Brownlee.