Iran – Islamic Republic issues

In 1979, Shah Reza Pahlavi was deposed and replaced by a republican government under a religious constitution.

 File:Iran revolution.jpg|1979 3r demonstration/revolution File:Iran 1979 revolution ovpt.jpg|8r revolution overprint File:Iran islamic unity.png|1982 25r Islamic Unity Day File:Iran Tabatabaje.jpg|1984 5r Tabatabaje File:Iran welfare week.jpg|1987 15rl Welfare Week File:Iran Human Dignity Day.jpg|2009 1200rl Human Dignity Day File:Iran 2020 monastery.jpg|2020 monastery of St. Thaddeus 
 * In April 1979, a set commemorating the revolution was issued, still inscribed IRAN.
 * Also in 1979, a provisional series was issued using old pictorial definitives overprinted diagonally and the Shah's portrait blocked out by lines.
 * Following issues were inscribed "Republique Islamique (de l') Iran" or "Islamic Republic of Iran". Stamps continued to include year dates somewhere in the design.
 * In February 1980, inscriptions were changed to R.I. Iran.
 * In mid-1984, inscriptions became I.R. IRAN.
 * In late 1986, inscriptions were mostly expanded to ISLAMIC REPUBLIC OF IRAN.
 * In 1992, inscriptions became ISLAMIC REP. OF IRAN.
 * In mid-2004, inscriptions once again became I.R. IRAN.