According to the Statistics Center, the country's population crossed 86 million mark in the last days of 1403.

According to Mehr News Agency, the Statistics Center of Iran announced: The population clock shows changes in the population and its increase in relation to time. In Iran, the population clock was first placed on the website of the Statistics Center of Iran in 2009, and since then, population estimates have been made available to users in real time.

In order to calculate the population clock designed on the National Statistics Portal, factors affecting population growth, including fertility, mortality, and migration, are first taken into account for the entire country.

For the first time, the first population clock was designed on the United Nations website. Given the large size of the world's population, this clock displays the estimated population in real time.

After the UN, populous countries such as China, the United States and India, and then less populous countries such as Australia, Canada and New Zealand, designed population clocks on related sites and provided their users with real-time population estimates.

The population clock displays Iran’s population at any given moment based on population estimates. Accordingly, the Population Clock of the Statistical Center of Iran shows that the country’s population exceeded 86 million people in the last days of 1403.