How do you say Where is market in Greek?

The most straightforward translation of "Where is the market?" in Greek is:

Πού είναι η αγορά; (Pou eínai i agora?)

* Πού (Pou): Where

* είναι (eínai): is

* η (i): the (feminine definite article)

* αγορά (agora): market

You could also use "παντοπωλείο" (pantopoléo) instead of "αγορά" if you mean a small grocery store or general store. However, "αγορά" is the more general term for a market.