Picture of the Trump crowd at time of swearing in. Crowd size estimated at between 1.2 and 1.5 million. Counting Neilsen's 30 million viewers and CNN's 16 million but not counting FoxNews streaming, and social media, Trump had a viewer audience of more than 46 million. Previous record was Reagan with 41 million.
Pic on left is the Obama crowd, 1.8 million. Pic on right is 6 hours before the top picture of the Trump crowd.