The National Front of Iran is an opposition political organization in Iran, founded by Mohammad Mosaddegh in 1949. It is the oldest and arguably the largest pro-democracy group operating inside Iran despite having never been able to recover the prominence it had in the early 1950s.

Mohammad Mosaddegh was an Iranian politician, author, and lawyer who served as the 30th Prime Minister of Iran from 1951 to 1953, elected by the 16th Majlis. He was a member of the Iranian parliament from 1923, and served through a contentious 1952 election into the 17th Iranian Majlis, until his government was overthrown in the 1953 Iranian coup d'état aided by the intelligence agencies of the United Kingdom (MI6) and the United States (CIA), led by Kermit Roosevelt Jr. His National Front was suppressed from the 1954 election.