Iran's population increased dramatically during the later half of the 20th century, reaching about 80 million by 2016. As of July 2024, Iran's population is around 89.8 million. In recent years, however, Iran's birth rate has dropped significantly. Studies project that Iran's rate of population growth will continue to slow until it stabilises above 100 million by 2050. Half of Iran's population was under 35 years old in 2012.