Iranian state television showed video Wednesday of pro-government rallies from areas across the country, after days of protests against the government and economic problems.
The crowds waved Iranian flags and chanted in support of Supreme Leader Ayatollah Ali Khamenei.
Khamenei has blamed other governments for driving the anti-government protests that began last week and have left at least 21 people dead.
Iran's Supreme National Security Council accused the United States, Britain and Saudi Arabia of being behind the protests.
U.S. President Donald Trump has used several Twitter posts to express support for those protesting the Iranian government.