1909 in Iran

The following lists events that have happened in 1909 in the Qajar dynasty, Iran.

Incumbents

 * Monarch: Mohammad Ali Shah Qajar (until July 16), Ahmad Shah Qajar (starting July 16)
 * Prime Minister:
 * until April 29: Ahmad Moshir al-Saltaneh
 * April 29-May 2: Kamran Mirza Nayeb al-Saltaneh
 * May 2-May 8: vacant
 * May 8-July 13: Javad Sa'd al-Dowleh
 * July 17-September 30: vacant
 * starting September 30: Mohammad Vali Khan Tonekaboni

Events

 * January 23 – The 7.3 Borujerd earthquake affected central Iran with a maximum Mercalli intensity of IX (Violent), killing between 6,000–8000.
 * July 16 – Ahmad Shah Qajar, the last king of Qajar dynasty, ascended to throne.