About Mountainville, NYMountainville is located in New York. Mountainville, New York has a population of 286. Mountainville is more family-centric than the surrounding county with 35% households with children. The county percentage for households with children is 34%. The median household income in Mountainville, New York is $126,971. The median household income for the surrounding county is $73,163 compared to the national median of $57,525. The median age of people living in Mountainville is 44.6 years. Mountainville WeatherThe average high temperature in July is 84.6 degrees, with an average low temperature in January of 18.9 degrees. The annual precipitation is 50.58. Mountainville MapMountainville real estate offices
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