What languages are spoken in Odessa Ukraine?

They speak Ukrainian as well as Russian.
I believe the official language in Ukraine is Ukrainain, but since it used to be part of the Soviet Union everybody speaks Russian as well.

In Odessa people mostly speak Russian, but in the West and some North regions people speak Ukrainian. I think it is a pity that ukrainians use Russian very often, i think they have to speak their own language, that was their for hudreds of years. Russia still has a big influence on Ukraine.