Latham is located in Logan county Illinois with a geographic area of 0.3 square miles. The total population in Latham is 355 with 56.3% male and 43.7% female. Children under age 5 represent 6.2% of the population, under age 18 equal 19.4% of the population and over age 65 is 17.7% of the population. The median household income is $54,309, per capita income is $26,002. There are a total of 149 housing units with 59.1% owner occupied. Education includes 18.1% of residents that are high school graduates and 12.8% with a bachelor's degree or higher. The average temperature in Latham in the summer is 74 degrees, and in the winter 27 degrees.