Born in other state
Westchester:
Rye 29.7%
Bronxville 25.3%
Larchmont 22.6%
Pelham 16.8%
Scarsdale 15.7%
Yorktown Heights 11.4%
Eastchester 7.9%
Long Island:
Garden City 8.7%
Roslyn 8.1%
Babylon 5.8%
Great Neck 5.2%
Deer Park 4.9%
Farmingdale 4.6%
Levittown 4.5%
Lindenhurst 3.3%
Franklin Square 2.7%
The distinction between Westchester and Nassau (not the subject of this thread, I know) that explains why they vote so differently is so obvious to those of us in the NY metro but so hard to capture with demographic data. It's impressive you found a statistic that illustrates it!