How do you say where is the bathroom in Greek?

The most common way to ask "Where is the bathroom?" in Greek is:

Πού είναι η τουαλέτα; (Pou ine i toualeta?)

* Πού (Pou): Where

* είναι (ine): is

* η (i): the

* τουαλέτα (toualeta): toilet/bathroom

You can also use:

Πού είναι τα W.C.; (Pou ine ta WC;) This is shorter and uses the abbreviation W.C. (for water closet). It's perfectly acceptable.