What were the winning lotto numbers on 06 21 2010 for New York?

I'm not sure if you're talking about the regular New York State Lotto, or another lotto game, because there was no drawing on 6-21-10 for the New York State Lotto. There was a drawing on 6-19 and 6-23, but not 6-21.

The Sweet Million game had a drawing on 6-21-10. Is that what you meant?

Perhaps it would be better if you just checked for yourself. See the Related Link below. It lists all of the winning numbers, for every New York lotto game, for the past year.