The coat of arms of the Orange Free State was the official heraldic symbol of the Orange Free State as a republic from 1857 to 1902, and later, from 1937 to 1994, as a province of South Africa. It is now obsolete.

The Orange Free State was an independent Boer sovereign republic under British suzerainty in Southern Africa during the second half of the 19th century, which ceased to exist after it was defeated and surrendered to the British Empire at the end of the Second Boer War in 1902. It is one of the three historical precursors to the present-day Free State province.