The analysis was done by the Washington Post. The newspaper researched what it said were 160,000 intercepted communications provided by Edward Snowden.
According to the Post, the materials included baby photos, selfies, medical records, and resumes. And the newspaper found that nearly 90-percent of the people whose communications where grabbed by the NSA where ordinary internet users.
The Post says the agency would classify someone as a "foreigner" for things such as logging onto email while traveling abroad, or using proxy servers outside the country.
At least one person was reportedly classified as foreign just because he or she communicated in a foreign language.
CNN's inquiries of the NSA were not answered.
But following Snowden's released of classified documents, President Obama and the NSA have defended certain programs, calling them important for national security.
So is there anything you can do to protect your online privacy?
Well, it is not clear that you can do anything to stop the NSA from seeing your online activity but you can do a few basic things to keep other intruders from getting your data.
For example, when you checkout at stores and they ask you for your phone number, zip code, or email address -- give them some wrong information or just say no thank you.
Also, experts suggest don't use any banking apps on your phone that can give others access to your money, and although it is pain, they really say to change your passwords once a month.