Blain is located in Perry county Pennsylvania with a geographic area of 0.3 square miles. The total population in Blain is 230 with 50.9% male and 49.1% female. Children under age 5 represent 3.9% of the population, under age 18 equal 34.8% of the population and over age 65 is 14.3% of the population. The median household income is $45,625, per capita income is $23,306. There are a total of 82 housing units with 67.1% owner occupied. Education includes 40.2% of residents that are high school graduates and 11.0% with a bachelor's degree or higher. The average temperature in Blain in the summer is 73 degrees, and in the winter 33 degrees.