Fridge is more common although older folks sometimes refer to it as an icebox.

Western U.S. Myself and almost everyone I know uses fridge more than refrigerator. :)

Thank you :)

I think it depends on where you're from in the US. I grew up saying refrigerator and still do. I use fridge at times but not often. Even my kids say refrigerator. My husband says fridge though.

Fridge is much more common because it is easier to say. Similarly, even though it is a television, practically everyone just says "TV"