As of the 2020 United States Census, Addison has a population of approximately 35,702 residents. Over the past few decades, the population size has remained relatively stable, but its demographic composition has grown remarkably diverse.
Addison is home to a significant and vibrant Hispanic and Latino community, which comprises roughly 40% to 45% of the population. White residents make up about 45%, with Asian (approx. 6%) and Black or African American (approx. 3%) communities making up most of the remainder.
The median age in the village is roughly 37 years old, indicating a healthy mix of young families, working-age professionals, and retirees. A large portion of households are family units. English and Spanish are the most widely spoken languages in the community, reflecting the town's multicultural modern identity.