The Official Pokemon website officially announced the types of the new starter Pokmeon: Chespin, Fennekin, and Froakie. Not that it wasn't already glaringly obvious what there types were, but some were hoping to get some multi-typing. There hasn't been a starter Pokemon with more than one type since Generation 1 (that was Bulbasaur, which is Grass/Poison). However, that's not to say that there evolutions won't pick up some types in the evolution process.
There is a rumor floating around that Chespin's evolutions may pick up a Dark Type, Fennekin may pick up Physic, and Froakie will pick up fighting. This speculation is based off of the moves that are displayed in the announcement video. Apparently, each starter Pokemon performs two moves. The first moves is an obvious type match, but the second move that it shows for each Pokemon seems to suggest the types that I mentioned. The Pokemon could learn moves out of there main type though, so this is still just a theory.
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