Is Riley a boy or girl name?
Parents can name their child pretty much anything they want. But Riley is typically not a given name at all, either boy's or girl's. It's usually a surname.
There are quite a few males with the given name Riley around, mostly male, such as the famous musician Riley Lee, but I've met girls named Riley or Rilee.
It can be either. My puppy is named Riley, and she is female. I like it as a girls name personally :)