Mill Neck is a village in Nassau County, New York in the United States. The population was 997 at the 2010 census.Mill Neck is located at 40°53′20″N 73°33′22″W / 40.88889°N 73.55611°W / 40.88889; -73.55611. The highest point of Mill Neck is Mill Hill.According to the United States Census Bureau, the village has a total area of 2.9 square miles, of which, 2.6 square miles of it is land and 0.3 square miles of it is water.As of the census of 2000, there were 825 people, 295 households, and 241 families residing in the village. The population density was 319.8 people per square mile. There were 326 housing units at an average density of 126.4 per square mile. The racial makeup of the village was 92.00% White, 0.24% African American, 4.73% Asian, 2.42% from other races, and 0.61% from two or more races. Hispanic or Latino of any race were 5.58% of the population.There were 295 households out of which 34.6% had children under the age of 18 living with them, 74.