Colonial Secretary may refer to:
In Great Britain
Secretary of State for the Colonies, the British Cabinet minister who headed the Colonial Office, commonly known as Colonial Secretary, a position created in 1768
In the colonies
Chief secretary (British Empire), also known as colonial secretary, the official in many British colonies who headed the day-to-day functions of the colony's government, deputy to the governor, including:
Australia
Colonial Secretary of New South Wales from 1821 to 1959 when the role was renamed to Chief Secretary
Colonial Secretary of South Australia, from 1836 to 1856 when the role was renamed to Chief Secretary
Colonial Secretary of Tasmania, from 1856 to 1873, previously Colonial Secretary of Van Diemen's Land from 1826 to 1856
Colonial Secretary of Western Australia, from 1828 to 1924
Other colonies
Chief Secretary (Hong Kong), renamed from the Colonial Secretary in 1976
Chief Secretary, Singapore, renamed from the Colonial Secretary in 1955
Colonial Secretary of Ceylon, one of six offices that held a seat in the Executive Council of Ceylon
Colonial Secretary (New Zealand), the chief administrator of New Zealand from 1840 to 1907
Colonial Secretary of the Bahamas, second highest official in the colony, usually appointed from Britain.