According to the Nielsen Company, the President's big day was viewed on television by an estimated 33.8 million people, which is actually still short of two past President's inauguration ceremonies.
TV viewers of Ronald Reagan's inauguration
President Ronald Reagan still holds a pretty dominant record when it comes to inaugural TV viewers, as over 41.8 million people tuned into the ceremony in 1981 according to NBC.
Barack Obama still holds second place with 37.8 million viewers watching his 2009 inauguration on TV.
However, Joe Biden was able to narrowly beat out his predecessor Donald Trump, who drew just 30.6 million TV viewers to his 2017 inauguration.