The Pew Research Center survey found 41 per cent of Americans have encountered fraudulent charges on their credit cards, and 35 per cent had sensitive information like an account number compromised.
Smaller percentages said their email or social media accounts had been compromised or that someone had impersonated them in order to file fraudulent tax returns.
Taken together, the survey found 64 percent said they had some form of personal data stolen or compromised.
Those surveyed were concerned about telecom firms, credit card companies and others, but especially wary of the government and social media companies.
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Only 12 per cent said they had a high level of confidence in the government's ability to protect their data and nine percent said the same of social media sites.
Yet the survey also found most Americans fail to take a proactive role in their own security with steps such as password management and enhanced authentication.
The vast majority -- 86 percent -- said they keep track of passwords by memory, and only 12 percent used password management software which is believed to be the most secure.
More than one in four respondents said they did not lock their smartphone screen, and some neglect to install important updates for their phones or applications.
The report is based on a survey conducted from March 30 to May 3, 2016, among 1,040 adults, with a margin of error for the full group estimated at 3.4 percentage points.
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