I will presume that what is being asked is the whole of the British Empire, regardless of timeline. I will further presume that this includes not only Colonies and Dominions, but also protectorates. North America; Alberta British Columbia Manitoba New Brunswick Newfoundland (Did not join Confederation until 1949, and while not part of the country of Canada, was a colony of Great Britain) Northwest Territories Nova Scotia Ontario Prince Edward Island Quebec Saskatchewan Yukon (Had it been created while the Empire was in its hay day, no doubt Nunavut would have joined as well) New Hampshire Massachusetts Rode Island Connecticut New Jersey Delaware Maryland New York Pennsylvania Virginia North Carolina South Carolina Georgia Caribbean; Bermuda Bahamas British Virgin Islands Anguilla Turk and Caicos Nevis Antigua and Barbados Cayman British Honduras Jamaica St. Lucia Montserrat Dominica Masquia Coast Grenada Trinidad and Tobago South America; British Guiana Ascension St. Helena Tristan Falkland Islands South Georgia Europe; England Wales Scotland Ireland Heligoland Minorca Ionian Islands Gibraltar Malta Middle East; Cyprus Palestine Tran Jordan Iraq Kuwait Bahrain Qutar Trucial Oman Oman Aden Africa; Egypt Gambia Togo land Sudan Sierra Leone Gold Coast Nigeria Cameroon Somaliland Uganda Kenya Tanganyika Northern Rhodesia Bechuanaland Nyasa Land South West Africa Rhodesia South Africa Asia; Weihaiwei Nepal Bhutan India Hong Kong Burma Maldives Ceylon South East Asia; Malaya Brunei Singapore Sarawak North Borneo Pacific Region; British New Guinea Nauru Gilbert Solomon Islands Ellice Islands Western Samoa Australia New Hebrides Fiji Tonga Pitcairn Islands New Zealand