Herkimer is located in Herkimer county New york with a geographic area of 2.6 square miles. The total population in Herkimer is 6,912 with 44.0% male and 56.0% female. Children under age 5 represent 0.7% of the population, under age 18 equal 10.9% of the population and over age 65 is 27.3% of the population. The median household income is $47,941, per capita income is $29,440. There are a total of 3,120 housing units with 49.9% owner occupied. Education includes 28.0% of residents that are high school graduates and 20.7% with a bachelor's degree or higher. The average temperature in Herkimer in the summer is 70 degrees, and in the winter 27 degrees.