Winfield is located in Lincoln county Missouri with a geographic area of 0.8 square miles. The total population in Winfield is 1,954 with 49.4% male and 50.6% female. Children under age 5 represent 5.6% of the population, under age 18 equal 29.2% of the population and over age 65 is 10.4% of the population. The median household income is $54,821, per capita income is $21,912. There are a total of 667 housing units with 57.9% owner occupied. Education includes 44.8% of residents that are high school graduates and 19.2% with a bachelor's degree or higher. The average temperature in Winfield in the summer is 76 degrees, and in the winter 32 degrees.