In 1848, approximately 70 followers of the French utopian socialist Étienne Cabet arrived in what is now Justin to found an Icarian community.

[6] Justin once was a center of salvage companies, which buy property involved in fires and tornadoes and sell it for discounted prices.

Because it is physically located in the city of Fort Worth, Justin had the opportunity to purchase the Texas Motor Speedway but at the time they did not have enough money to run and provide maintenance to the speedway, the United States Postal Service changed the mailing address to Fort Worth, Texas.

[citation needed] WFAA-TV, Channel 8, has operated a 750 kilowatt Doppler weather radar out of Justin since January 25, 1995.

[8] According to the United States Census Bureau, the city has a total area of 2.4 square miles (6.2 km2), all land.