Edward Jacob Lang, 26, posted pictures on social media including one that said "This is me."
FBI agents showed up at Lang's home in Newburgh Saturday and took him into custody.
They also executed a search warrant.
Investigators have not yet announced specific charges against Lang.
Thousands of supporters of President Donald Trump stormed the Capitol on Jan. 6 as Congress was meeting to vote to affirm President-elect Joe Biden's electoral win. Five people died in the mayhem.
Law enforcement officials across the country have been working to locate and arrest suspects who committed federal crimes. So far, they have brought nearly 100 cases in federal court and the District of Columbia Superior Court.
Information from the Associated Press was used in this report.
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