Allen is a city in Collin County, Texas, and a wealthy northern suburb of Dallas. As of the 2000 census, the city had a total population of 43,554. As of April 2007, the city's population is estimated at 77,465.
The Allen Independent School District has 15 elementary schools, 3 middle schools, 1 freshman center, 1 alternate school, and 1 high school (Allen High School). Allen ISD serves almost all of Allen.
Small portions of the Allen city limits extend into Lovejoy, McKinney, and Plano ISDs. In the fall of 2006, new 9th grade high school students in the Lovejoy ISD boundaries began attending the newly opened Lovejoy High School. A new grade level is to be added each subsequent school year, making the school a full 4-year high school in the 2009-10 school year. Existing Allen High School (Classes 2008 and 2009) students within the Lovejoy ISD boundaries continue to attend Allen High School.
The Allen Eagle Escadrille, Allen High School's marching band, performed in the 2006 Tournament of Roses Parade and Bandfest in Pasadena, California. The Escadrille has 650 members, including the band, drill team, and color guard. The Escadrille is the largest high school band in the world. It was also a special participant in the 1994 St. Patrick's Day Parade in Dublin, Ireland, 1995 and 1999 Texas Gubernatorial Parades, 1997 Macy's Thanksgiving Day Parade in New York City, a recipient of the Sudler Shield Award by the John Phillip Sousa Foundation in 2004 and marched in the 117th Tournament of Roses Parade in Pasadena, California on January 2, 2006.