If you had to guess which social media site is used most by Americans, would you guess platforms like Facebook, Instagram or TikTok? Even though these wouldn`t be terrible guesses, new polling from Pew Research Center shows it`s an app many of us might not even think of as a social media site.

Though it`s a little bit different than platforms where all users have profiles and post their own content, the most-visited social media site in the U.S. is actually YouTube.

The survey of just over 5,000 U.S. adults found that 84 percent said they had used YouTube, the highest amount of any platform. For context, the next-highest percentage, (71 percent) goes to Facebook. These two platforms dominate social media usage, per the survey, with about half of U.S. adults saying they visit YouTube and/or Facebook daily.

Here`s the popularity of each major social media site, as determined by the data.

Site/app                       Percent of U.S. adults who say they ever use it
YouTube.                      84%
Facebook                      71%
Instagram                     50%
TikTok.                         37%
WhatsApp                     32%
Reddit.                         26%
Snapchat                      25%
X (Twitter)                    21%

Meanwhile, some smaller/newer social media sites showed some adult user respondents, too.

Meta`s Threads, a real-time microblogging social site akin to the original Twitter, had 8% of U.S. adults say they had ever used the site. This shows the highest amount among the three smaller platforms. The other two are Twitter-founder Jack Dorsey`s Bluesky, also a real-time microblogging site akin to the original Twitter, (4 percent of U.S. adults), and President Donald Trump`s Truth Social (3 percent U.S. adults).

Pew also found notable age differences in the users of each social site, even between YouTube and Facebook. While both sites are the only two platforms found to be used by a majority in all age groups, Facebook`s main user base still skews decidedly older (30-49 year olds are its biggest percentage of users, followed by people 65 and over) than the video platform.

When it comes to younger adults - those under 30 - they were found to be more likely to use Instagram, Snapchat, TikTok, Reddit and YouTube over most other sites. And while 68 percent of people 18-29 report using Facebook, they use Instagram, Snapchat and TikTok in greater numbers.