How do you address a Supreme Court Judge?

A supreme court justice is called a "justice", not a judge.

If you know who you're addressing, you can call them "Justice ______". That's the best form of address. If your not 100% sure who you're speaking to, it's hard to go wrong calling them "Sir" or "Ma'am". You should not address them as "Mister _____" or "Judge _____".

The Chief Justice should be addressed as "Chief Justice _____" not just "Justice ____".