Winfield is located in Putnam county West virginia with a geographic area of 2.4 square miles. The total population in Winfield is 3,133 with 49.8% male and 50.2% female. Children under age 5 represent 5.6% of the population, under age 18 equal 25.3% of the population and over age 65 is 13.5% of the population. The median household income is $69,432, per capita income is $32,819. There are a total of 1,079 housing units with 81.7% owner occupied. Education includes 21.4% of residents that are high school graduates and 36.7% with a bachelor's degree or higher. The average temperature in Winfield in the summer is 69 degrees, and in the winter 32 degrees.