Water Mill is a city located in Suffolk County New York. Water Mill has a 2020 population of 1,631. Water Mill is currently declining at a rate of 0.00% annually and its population has increased by 4.62% since the most recent census, which recorded a population of 1,559 in 2010. Water Mill reached it's highest population of 2,349 in 2016.
The average household income in Water Mill is $285,754 with a poverty rate of 10.18%. The median rental costs in recent years comes to - per month, and the median house value is $1.61 Mn. The median age in Water Mill is 53.6 years, 53.2 years for males, and 54 years for females.