Sir William Bisset Berry KC (26 July 1839 – 8 June 1922) was a Scots-born South African politician and the fourth Speaker of the Legislative Assembly of the Cape Colony.

His engagement to Agnes Baden-Powell was announced in The Illustrated London News of 27 April 1901, but they never married.

When there was a vacancy for the position of Speaker of Parliament, he was elected unopposed in 1898,[1] even though he had only 4 years of parliamentary experience and his command of the Afrikaans language was small.

He presided over the votes of no confidence in Sprigg's government and the application of martial law in the Cape Colony.

In 1902, he distinguished himself with his strong opposition to the attempt by the British Colonial Office to suspend the Cape constitution.