McGovern, who ESPN's Mel Kiper Jr. projects as the top draft-eligible guard, announced his decision Wednesday on Twitter. He thanked Penn State fans and coaches, among others.
McGovern, who earned third-team All-Big Ten honors this season, started 34 of 39 career games at Penn State.
"He has been instrumental in building our offensive line room's chemistry," coach James Franklin said in a statement. "We are excited for Connor to take this next step in his football career."
Also, Nittany Lions junior offensive linemen Ryan Bates, junior defensive tackle Kevin Givens and junior defensive end Shareef Miller have declared for the draft.