A new cultivar of Azalea named ‘AZ 16’ that is characterized by its uniform flower color and size, its strong flowering during its extended flowering season blooming in late March to early April and then again in late August through October in Mississippi, its large pink flowers with red flecks and red undertones on the upper surface of the petals, its leaves that retain a burgundy color through winter and into the spring bloom season, its rapid development and a tight crown with only minimum pruning required when grown under optimum conditions in containers, and its exceptional environmental stress tolerance including fluctuations in moisture and temperature stress, and its good disease and pest resistance.