It's pretty white: https://datausa.io/profile/geo/manhasset-ny
Then again I live here: https://datausa.io/profile/geo/dix-hills-ny
and the Whitest thing I can say is my neighbor across the street are black and that we are adjacent to here: https://datausa.io/profile/geo/wheatley-heights-ny and here: https://datausa.io/profile/geo/wyandanch-ny. My other two neighbors are Chinese and Greek and there are other ethnicities on our street. Our little 22 some house nabe is pretty diverse all things being equal. Manhasset can be very white, very Persian, especially as you get closer to Great Neck. It's Jewish but not as Jappy as say Roslyn. I like it there and the proximity to the city is great. I get more bang for the buck in Dix Hills. I get great public/municipal services, parks, and schools for the taxes I pay. The schools are great.
I'm just a kid from Austins 78731, good public school trash from McCallum HS.
I'm 50 min in a car or the train to NYC, and the train stop while in Wyandanch is only six minutes away. I'm an hour and change to the Hamptons