Kirby is located in Hot springs county Wyoming with a geographic area of 0.2 square miles. The total population in Kirby is 83 with 59.0% male and 41.0% female. Children under age 5 represent 3.6% of the population, under age 18 equal 10.8% of the population and over age 65 is 22.9% of the population. The median household income is $29,306, per capita income is $17,990. There are a total of 35 housing units with 94.3% owner occupied. Education includes 65.7% of residents that are high school graduates and 8.6% with a bachelor's degree or higher. The average temperature in Kirby in the summer is 59 degrees, and in the winter 16 degrees.