Castor is located in Bienville county Louisiana with a geographic area of 1.2 square miles. The total population in Castor is 300 with 40.7% male and 59.3% female. Children under age 5 represent 13.3% of the population, under age 18 equal 31.7% of the population and over age 65 is 16.3% of the population. The median household income is $30,789, per capita income is $14,327. There are a total of 120 housing units with 69.2% owner occupied. Education includes 47.5% of residents that are high school graduates and 20.0% with a bachelor's degree or higher. The average temperature in Castor in the summer is 81 degrees, and in the winter 51 degrees.