Maria stein is located in Mercer county Ohio with a geographic area of 5.1 square miles. The total population in Maria stein is 1,141 with 51.3% male and 48.7% female. Children under age 5 represent 7.6% of the population, under age 18 equal 30.4% of the population and over age 65 is 11.1% of the population. The median household income is $78,365, per capita income is $32,283. There are a total of 455 housing units with 85.9% owner occupied. Education includes 29.7% of residents that are high school graduates and 24.6% with a bachelor's degree or higher. The average temperature in Maria stein in the summer is 73 degrees, and in the winter 32 degrees.