Fort plain is located in Montgomery county New york with a geographic area of 1.3 square miles. The total population in Fort plain is 1,837 with 45.7% male and 54.3% female. Children under age 5 represent 7.4% of the population, under age 18 equal 22.6% of the population and over age 65 is 15.4% of the population. The median household income is $33,114, per capita income is $19,481. There are a total of 743 housing units with 59.1% owner occupied. Education includes 32.0% of residents that are high school graduates and 17.2% with a bachelor's degree or higher. The average temperature in Fort plain in the summer is 70 degrees, and in the winter 27 degrees.