Johnson, a Republican, said in a letter to Biden, a Democrat, it was his duty to send the invite "in this moment of great challenge for our country." A copy of the letter was posted on X, the social media site.
The State of the Union address is an annual speech given by the U.S. president to a joint session of Congress.
Biden is running for a second term in the Nov. 5 election. On Friday, Biden accused former Republican President Donald Trump, his likely opponent, of instigating the Jan. 6, 2021 attacks on the Capitol and plotting revenge on those seeking to punish him, as he puts the future of U.S. democracy at the center of his bid for re-election.
The speech is scheduled after two deadlines on Jan. 19 and Feb. 2 to avert shutdowns of parts of the federal government.
(Reporting by Timothy Gardner; editing by Diane Craft)
