Ronald William Brown (7 September 1921 – 27 July 2002) was a British Labour Party politician. He was the younger brother of George Brown, interim Leader of the Labour Party in 1963.
In 1981, Brown was among a number of Labour MPs who defected to the Social Democratic Party (his brother also indicated his support and later joined). He lost his seat at the 1983 general election, polling 18% of the vote behind the Labour candidate Brian Sedgemore (who defected to the Liberal Democrats himself in 2005). Brown died in 2002 aged 80.