President Trump’s first address to a joint session of Congress on Tuesday night drew an audience of about 47.7 million viewers, according to Nielsen data released Wednesday.

Mr. Trump’s speech — which was broadcast in prime time on all the major cable news channels and the four broadcast networks — had about 16.4 million more viewers than President Barack Obama’s final State of the Union address last year. But it trailed the 52.4 million viewers that watched Mr. Obama’s first address to a joint session in 2009.

More than 20 percent of the total viewers for Tuesday’s address were watching Fox News, which had 10.4 million viewers between 9 p.m. and 10:15 p.m.

NBC led the broadcast networks with roughly nine million viewers. The network probably benefited from its 8 p.m. lead-in, the return of “The Voice,” which was the No. 1 broadcast network show of the night, with more than 11 million viewers.