Calvin is located in Hughes county Oklahoma with a geographic area of 0.9 square miles. The total population in Calvin is 357 with 51.3% male and 48.7% female. Children under age 5 represent 13.7% of the population, under age 18 equal 48.2% of the population and over age 65 is 11.8% of the population. The median household income is $39,018, per capita income is $14,536. There are a total of 97 housing units with 56.7% owner occupied. Education includes 21.6% of residents that are high school graduates and 27.8% with a bachelor's degree or higher. The average temperature in Calvin in the summer is 80 degrees, and in the winter 42 degrees.