Keller, Texas is a moderately-sized city with a population of 44,250 residents. If we look at the most recent Census, Keller 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 88% of the population considered married and 49% with kids under the age of 18, Keller could be considered a very suitable city for families.