Cool is a city in Parker County, Texas, United States.

[5] According to the United States Census Bureau, the city has a total area of 1.6 square miles (4.1 km2), all land.

17.7% of all households were made up of individuals, and 8.1% had someone living alone who was 65 years of age or older.

About 16.4% of families and 20.9% of the population were below the poverty line, including 26.7% of those under the age of eighteen and 15.2% of those 65 or over.

Public education in the city of Cool is provided by the Millsap Independent School District.