Seneca is located in Venango county Pennsylvania with a geographic area of 2.2 square miles. The total population in Seneca is 982 with 53.9% male and 46.1% female. Children under age 5 represent 2.7% of the population, under age 18 equal 23.1% of the population and over age 65 is 33.9% of the population. The median household income is $44,425, per capita income is $29,240. There are a total of 471 housing units with 71.8% owner occupied. Education includes 29.5% of residents that are high school graduates and 31.4% with a bachelor's degree or higher. The average temperature in Seneca in the summer is 73 degrees, and in the winter 33 degrees.