Marykate O'Neil (born in Hudson, Massachusetts) is an American indiepop singer-songwriter, currently based in New York City.
She is known for her quirky, literate pop sensibilities.
She released her fourth solo effort, Underground (Nettwerk/71 Recordings), on February 3, 2009, following 2002's self-titled album (which made it onto CMJ's 'Best of 2002' list), 2006’s 1-800-Bankrupt, and 2008’s mkULTRA EP.
Her work has previously been hailed by critics as "witty, angsty goodness" [ and "pure magic".