The survey was conducted among 1,167 people across the United States between August 28 and 31, 2026.
According to the findings, 25% of respondents said the war was justified, while 21% said they were unsure. A majority of 54% said they did not believe the war was justified.
Concerns that the conflict between the United States and Iran could escalate further have grown after the two sides resumed exchanging attacks following a period of relative calm.
The situation intensified after US airstrikes targeted Iran on Tuesday, prompting Iran to launch retaliatory attacks.
The poll suggests that Americans view the war in Iran in a similar way to the conflicts in Afghanistan and Iraq, which began in the early 2000s. Over time, majorities of Americans have expressed the view that those wars were not justified.
Reuters reported that as the United States approaches the midterm elections, allies of President Donald Trump are concerned about preventing the conflict from escalating further or becoming a dominant issue in the news.
The growing opposition to the war could become a significant political challenge for the Trump administration, particularly if the conflict continues and tensions between Washington and Tehran intensify.
