China Tops List of Countries That Could Face Trump’s Iran Tariff Threat

China is the biggest buyer of Iranian oil, accounting for more than 80 percent of purchases.

U.S. President Donald Trump speaks as Secretary of State Marco Rubio and Secretary of Defense Pete Hegseth look on, during a press conference in Palm Beach, Fla., on Jan. 3, 2026. Jonathan Ernst/Reuters

As Iran’s biggest trading partner and largest oil purchaser, China tops the list of countries that could face an additional 25 percent tariff after President Donald Trump’s Monday announcement.

Trump posted on Truth Social that all countries doing business with Iran will pay a 25 percent tariff “on any and all business being done with the United States,” hours after signaling that airstrikes or other measures against Iran were on the table.