24/7 Trauma & Biohazard Cleanup Near Avondale Allen, TX

Allen is a fast-growing city in Collin County, about 20 miles north of downtown Dallas in the Dallas-Fort Worth metroplex.

Allen began in 1870 as a townsite of the Houston and Texas Central Railway and was named in 1872 for Ebenezer Allen, a former Texas attorney general and railroad promoter.

On February 22, 1878, outlaw Sam Bass and his gang committed in Allen what is said to be the first train robbery in Texas.

From 1908 to 1948, Allen was a stop on the Texas Traction Company's electric interurban line running between Denison and Dallas.

Allen was still a small town of only a few hundred residents when it incorporated in 1953.

Allen's population exploded with Dallas suburban growth, rising from 43,554 in 2000 to 84,246 in 2010 and 104,627 in the 2020 census.

Census Bureau surveys count about 37,243 households in Allen, with nearly three people per household and about 69% of homes owner-occupied.

Allen has a single public high school — Allen High School — which is the largest high school in Texas, enrolling more than 5,000 students.

Allen High School's Eagle Stadium, built in 2012 for about $60 million, seats 18,000 fans and ranks among the largest high school football stadiums in Texas.

Allen hosts a Collin College campus inside Allen High School, plus the 340,000-square-foot Collin College Technical Campus that opened in west Allen in 2020 for workforce education.