Caldwell is located in St. francis county Arkansas with a geographic area of 3.2 square miles. The total population in Caldwell is 445 with 51.5% male and 48.5% female. Children under age 5 represent 5.6% of the population, under age 18 equal 17.8% of the population and over age 65 is 31.2% of the population. The median household income is $37,386, per capita income is $22,056. There are a total of 215 housing units with 67.0% owner occupied. Education includes 32.1% of residents that are high school graduates and 11.6% with a bachelor's degree or higher. The average temperature in Caldwell in the summer is 78 degrees, and in the winter 37 degrees.