Allen is a mid-sized city located in the state of Texas. The city has a population of 94,710 people. With a population density of 3,589 people per square mile, Allen is well above the nation’s average density level. If we look at the most recent Census, Allen is known to have a predominantly White population. The next two most common races are Asian and Black. If finding a family friendly city is important to you, look no further. With more than 83% of the population considered married and 41% with kids under the age of 18, Allen could be considered a very suitable city for families.