List of Countries with English as a De Facto Official Language Posted on July 7, 2015July 7, 2015 by English Man Below is the list of countries where English is a de facto official language, 1. United States 2. United Kingdom 3. Canada 4. Australia 5. New Zealand Source :: Wikipedia.org Share this: Posted in English Language, General. English Man View posts by English Man A keen English learner and speaker, always looking to learn new things.