Mastic Beach is a city located in Suffolk County New York. Mastic Beach has a 2020 population of 12,610. Mastic Beach is currently declining at a rate of 0.00% annually and its population has decreased by -2.47% since the most recent census, which recorded a population of 12,930 in 2010. Mastic Beach reached it's highest population of 15,547 in 2013.
The average household income in Mastic Beach is $87,141 with a poverty rate of 14.07%. The median rental costs in recent years comes to $1,829 per month, and the median house value is $225,100. The median age in Mastic Beach is 39.4 years, 39.4 years for males, and 39.5 years for females.