Merrill is located in Plymouth county Iowa with a geographic area of 0.5 square miles. The total population in Merrill is 1,016 with 56.0% male and 44.0% female. Children under age 5 represent 4.9% of the population, under age 18 equal 28.4% of the population and over age 65 is 15.7% of the population. The median household income is $60,329, per capita income is $26,516. There are a total of 399 housing units with 74.4% owner occupied. Education includes 31.3% of residents that are high school graduates and 8.5% with a bachelor's degree or higher. The average temperature in Merrill in the summer is 72 degrees, and in the winter 23 degrees.
