Ultra Music Festival (UMF) is an annual outdoor electronic music festival that takes place during March in Miami, Florida, United States.

It was first held on Miami Beach, but besides a tenure at Bicentennial Park, and briefly being held at Virginia Key in 2019, it has primarily been held at Bayfront Park in downtown Miami. It was a two-day festival from 1998 to 2006.

Since 2011, Ultra has taken place across three days (Friday through Sunday) during the month of March. In 2012, it had a record attendance, of 155,000 people. In 2013, the festival took place across two consecutive weekends to celebrate its 15th anniversary, with a combined attendance of 330,000 people. In 2014, the festival returned to its original single-weekend format, selling out pre-sale tickets in under five minutes. The city of Miami has estimated that since 2012, Ultra has “generated approximately $995 million of economic impact”, with $168 million in 2018 alone.