Rhu (/ruː/; Gaelic: An Rubha pronounced [ən rˠu.ə]) is a village and historic parish on the east shore of the Gare Loch in Argyll and Bute, Scotland.
The traditional spelling of its name was Row, but it was changed in the 1920s so that outsiders would pronounce it correctly. The name derives from the Scots Gaelic rubha meaning "point".
It lies north-west of the town of Helensburgh on the Firth of Clyde, in Argyll & Bute, and historically in the county of Dunbartonshire. Like many settlements in the area, it became fashionable in the 19th century as a residence for wealthy Glasgow shipowners and merchants.
Rhu and Shandon Parish Church dates from 1851 and stands on the site of an 18th-century predecessor. Amongst those buried in the kirkyard is Henry Bell, whose Comet was the world's first commercially successful steamship. In 1851 the marine engineer Robert Napier built the statue which today marks Bell's grave.
Famously a Theological controversy took place in Rhu known as the "Row Heresy", involving the Church of Scotland minister John McLeod Campbell who began to teach doctrines contrary to the Westminster Confession of Faith and was subsequently thrown out of the ministry in May 1831.