CRL holds over 800 microfilm reels and 500 fiche of Colonial Office records. Content may be included in other microfilm sets (see also Home Office or Foreign Office sets). Substantial or complete sets are listed below.

   Africa

• PRO. CO 48 - Cape of Good Hope Colony (Cape Colony), original correspondence. v.160-190 (1828/1834-1938)
• PRO. CO 551 - Union of South Africa, Original Correspondence. v. 1-69 (1910-1914)
• PRO. CO 879 - Confidential print. Africa, 1848-1961
• PRO. CO 2 & 392 - The exploration and colonization of Africa (1794-1844)

   America and West Indies

• PRO. CO 5 - America and West Indies. Original correspondence, etc., 1606-1807. [partial set, v. 90-111, 390-297, 848-921 ]
• PRO. CO 42 - Canada, formerly British North America. Original Correspondence, 1700-1922. [partial set, v. 1-157, 315-356]
• PRO. CO 137 - Jamaica. Original correspondence, 1689-1951. [partial set, v. 18-23, 48, 56, 91-248]
• PRO. CO 142 - Jamaica, Miscellanea, 1658-1945. [partial set, v. 13-29]

   Middle East

• PRO. CO 733 - Palestine. Original  correspondence, 1927-1934 [v. 130-268; see also v. 286-415]

   Pacific

• PRO. CO 129 - Hong Kong. Original Correspondence, 1841-1951 [partial set, v. 271-303, 474-478]
• PRO. CO 717 - Malay States, Federated. Original Correspondence, 1920-1940.
• PRO. CO 940 - Singapore, sessional papers, 1946-1965. [partial set, v. 1-9 (1946-1950)]