Shelly "Lee" Leffingwell (born October 13, 1939) is an American environmentalist and politician who served as the 57th mayor of Austin from 2009 to 2015.

A member of the Democratic Party, Leffingwell previously served as chair of Austin's Environmental Board.

His father was an Austin firefighter and later a Travis County Deputy Sheriff and his mother worked as an admissions clerk at UT.

He was a pilot for Delta Air Lines for almost 32 years, ending his airline career as an international Boeing 767 and MD-11 Captain.

He ran on a platform of increased public transparency, investment in transportation infrastructure, and support of small business.