Collinsville is located in Grayson county Texas with a geographic area of 1.0 square miles. The total population in Collinsville is 1,733 with 57.2% male and 42.8% female. Children under age 5 represent 7.3% of the population, under age 18 equal 23.9% of the population and over age 65 is 12.1% of the population. The median household income is $54,837, per capita income is $28,801. There are a total of 661 housing units with 54.2% owner occupied. Education includes 36.8% of residents that are high school graduates and 13.6% with a bachelor's degree or higher. The average temperature in Collinsville in the summer is 83 degrees, and in the winter 49 degrees.
