'Yous' is also used (or 'yoused' - ha ha) in several other places as part of a regional accent or dialect of English.

Other localities in America where I've heard it include New Jersey, where it is part of the oh so attractive Jersey accent, the New York City area, including the outer boroughs and downscale part of Long Island (where it is often followed by 'guys'), and the Cincinnati area, especially the West Side.

In the UK, it is a characteristic part of the Scouser accent of the Liverpool area, and is widely used in Northern England and throughout Scotland.

On either continent, it seems to be a working class phenomenon.