According to Wikipedia, there are 51 countries that list English as their official language. Among these are Canada, Malta, Fiji, and South Africa. India is the largest English speaking country with a population of 1.14 billion. That with a B people. Woah right?
If you clicked on the link, you will notice that The United States is not on that list. English is a de facto language for our country. This basically means that everyone knows its our official language but no one has ever come out and declared it officially. I do remember a quote saying The United States' official language is American, but for the life of me, I cannot locate it. Prize to anyone who can tell me who that is. Other countries with English as their de facto language include the United Kingdom and Australia.
Additionally, there are 27 non-sovereign entities that use English as their official language. They include Guam, American Samoa, Hong Kong, Cook Islands, and Falkland Islands. How does it feel to be so enlightened?