Tony O'Donnell (born March 7, 1961) is an American politician, who represented District 29C in the Maryland House of Delegates.

After the Navy, he was a supervisor for the Instrument Modifications Unit at Baltimore Gas & Electric's Calvert Cliffs Nuclear Power Plant.

O'Donnell was first elected in 1995 into the Maryland House of Delegates for District 29C, which covers parts of Calvert and St. Mary's Counties.

[9] In November 2011, O'Donnell announced his intention to run for the United States Congress representing Maryland's 5th congressional district currently held by Democratic incumbent Steny Hoyer.

The 5th district spans from Anne Arundel, Calvert, Prince George's and Saint Mary's Counties.