James Hume Walter Miéville Stone (born 16 June 1954) is a Scottish Liberal Democrat politician.
He was elected to the House of Commons at the 2017 snap general election to represent the national constituency of Caithness, Sutherland and Easter Ross.He was a Member of the Scottish Parliament for the constituency of Caithness, Sutherland, and Easter Ross, which is the northernmost mainland British constituency and one of the largest by area.
He held the seat from the opening of the Scottish Parliament in 1999, until he stood down in 2011.