Croghan is located in Lewis county New york with a geographic area of 0.4 square miles. The total population in Croghan is 603 with 49.8% male and 50.2% female. Children under age 5 represent 8.3% of the population, under age 18 equal 29.4% of the population and over age 65 is 22.6% of the population. The median household income is $56,875, per capita income is $24,943. There are a total of 226 housing units with 67.3% owner occupied. Education includes 38.5% of residents that are high school graduates and 26.5% with a bachelor's degree or higher. The average temperature in Croghan in the summer is 70 degrees, and in the winter 27 degrees.