How many millions of vs How many million of Google Search shows that English-speaking people don't ask questions this way) The expression occurs as a part of indirect questions mostly on context.reverso.net or similar websites. However, it is a natural question in my language and I saw it in an exercise in a textbook published here. I have the keys, so I have no doubt about the authors' opinion) Nevertheless, I'd like to hear from natives. The whole sentence is "How many million/millions people live in that city?"