Colby is located in Thomas county Kansas with a geographic area of 3.6 square miles. The total population in Colby is 5,426 with 48.0% male and 52.0% female. Children under age 5 represent 6.7% of the population, under age 18 equal 22.7% of the population and over age 65 is 15.1% of the population. The median household income is $62,001, per capita income is $32,483. There are a total of 2,307 housing units with 67.4% owner occupied. Education includes 18.0% of residents that are high school graduates and 18.4% with a bachelor's degree or higher. The average temperature in Colby in the summer is 73 degrees, and in the winter 32 degrees.
