The kingdom began a programme of television advertisements, billboards, documentaries and other public outreach last month to show people that terrorism hurts everyone.
In a region where US foreign policy is unpopular and Washington is often accused of being arrogant and aggressive, there is much sympathy for insurgents who say they are fighting US imperialism and oppression in the name of Islam.
The Saudi campaign is meant to explain to the people that "extremism and terrorism are not a part of our faith, that there is a human cost associated with it", said Adil al-Jubair, foreign policy adviser to Saudi Crown Prince Abd Allah.
The outreach includes up to 25 television ads per day on all Saudi channels, anti-terrorism slogans on utility bills, bank receipts and football jerseys, and even quirkier gimmicks such as naming a racing camel No To Terrorism.
"We are going to be running public opinion polls after the ads, after the campaign is concluded, to ... test the reaction among the Saudi public," al-Jubair told a news briefing.
"We will be testing the impact of this campaign ... in the next two or three weeks, and assess what else we can do, whether we continue, or whether we make adjustments to it."
Use of public opinion polls is increasing but they are still rare in Saudi Arabia, a conservative monarchy with very limited popular input in government.