Middle Island is a city located in New York. Middle Island has a 2020 population of 10,216. Middle Island is currently declining at a rate of 0.00% annually and its population has decreased by -2.55% since the most recent census, which recorded a population of 10,483 in 2010. Middle Island reached it's highest population of 10,483 in 2010.
The average household income in Middle Island is $82,096 with a poverty rate of 11.05%. The median rental costs in recent years comes to $1,664 per month, and the median house value is $267,900. The median age in Middle Island is 45.4 years, 45.3 years for males, and 45.5 years for females. For every 100 females there are 86.5 males.