The age old question facing New Yorkers: Where does upstate begin?

As Gov. Andrew Cuomo pushes a new casino expansion plan — known as “Phase I” — of an effort to build up to seven casinos statewide, he’s placing them all in the upstate region in order to attract New York City tourists.

The proposal comes as the state Legislature considers second passage of a constitutional amendment to expand casino gambling in New York. In his third State of the State address, Cuomo proposed a separate law outling regulations for casinos, which would place them exclusively in upstate for the time being, along with transferring 10 percent of the revenues to local governments for property tax relief (90 percent would go to education).

But what includes or doesn’t include upstate?

“North of the Bronx,” Cuomo joked at a question-and-answer session earlier today.

He immediately clarified to say that for purposes of defining upstate still, well, need to be clarified with state lawmakers.

Cuomo reiterated that the point of placing casinos north of New York City would mean bringing more people to the jobs-starved area.

“For purposes of the statute, we haven’t defined upstate New York. But the point is not the New York City metropolitan area because if you put a casino in the New York City metropolitan area the casino operators would be quite frankly less interested in citing them in upstate New York,” Cuomo said. “They’ll believe if there’s a casino in New York City, they’ll believe that’s the primary casino in New York and they’ll go there.”

Where the casinos are built — which ultimately is decided by a gaming commission — will likely be a pitched battle this year in Albany, even without New York City being part of the equation.

And as for defining upstate, that too will be a negotiating poin.

“That is going to be a subject of discussion, with the legislation, with the Legislature, it’s obviously a big point,” Cuomo said.

There’s no timetable, he said, for building the other four casinos.

As for competing with the Indian-run casinos in New York, Cuomo said he wouldn’t violate the gaming contracts in western New York as long as “they are in good standing.”