Allen is located in Collin County, TX. The population is 89,631, making Allen the 4th largest city in Collin County.
There are 25 public schools in Allen with an average Homefacts rating of A. The total crime rate for Allen is low, and there are 56 registered sex offenders residing in the city. Unemployment in Allen is moderate and the median home sales price is $0. Detailed and up-to-date Allen property reports are available for any property address.