In the World Atlas of Language Structures, English is listed as [having three genders](http://wals.info/feature/30A#2/25.5/148.2), just like German and Russian.

However it is only present in third-person singular pronouns, and male or female pronouns are almost always only applied to animate creatures according to their biological or self-identified gender (namely humans and occasionally animals, especially pets), apart from rare exceptions for fetishized or anthropomorphized personal possessions, or obsolescent usages involving countries or ships.

So it might be more useful to make a clear distinction between the vestiges present in English and the full-fledged three-gender system of German or Russian.