The Responsible Government Association (RGA), called the Rhodesia Party from 1923, was a political party in Southern Rhodesia. Founded in 1917, it initially advocated responsible government for Southern Rhodesia within the British Empire, as opposed to incorporation into the Union of South Africa. When responsible government was achieved in 1923, the party became the governing Rhodesia Party. It endured until 1934, when it merged with the right wing of the Reform Party to create the United Party, which remained in power for 28 years afterwards, and was itself defunct by 1965.