Theodore Francis "Ted" Leo (born September 11, 1970 in South Bend, Indiana), is an American punk rock/indie rock songwriter and multi-instrumentalist who has played in the bands Citizens Arrest, Chisel, The Sin-Eaters, The Spinanes, and Ted Leo and the Pharmacists. He has also kept up a consistent presence as a solo performer since the late 1990s.

Though born in Indiana, Leo grew up in Bloomfield, New Jersey, where his family is from, and spent many formative years in the hardcore punk scene of New York City during the 1980s and early 1990s. He graduated from Seton Hall Preparatory School in West Orange in 1988 and the University of Notre Dame in the fall of 1993 with a degree in English. His brothers Chris Leo and Danny Leo are also singer-songwriters, and members of Native Nod, The Lapse, The Van Pelt, Vague Angels and Holy Childhood. He is a vegan.