Allen is a city in Collin County in the U.S. state of Texas, and a northern suburb in the Dallas–Fort Worth metroplex. The population was 104,627 at the 2020 census, and was estimated to be 111,551 in 2022. The town was established by the Houston and Texas Central Railway and named in 1872 for Ebenezer Allen, a state politician and railroad promoter. The railroad allowed the sale of crops across the country before they rotted, causing a shift from the previous cattle-based agriculture. On February 22, 1878, Eight were killed, along with the shooter, and seven were injured. The perpetrator was 33-year-old Mauricio Martinez Garcia, a known white supremacist and Nazi admirer, although his specific motive for the shooting was not clear.
Geography
According to the United States Census Bureau, the city has a total area of , of which is land and is water. In 2019, an EF-0 tornado touched down in west Allen.