SXSW is a Music, Film, and Interactive conference and festival in Austin, TX.

The music festival is one of the largest in the United States, with more than 1,400 performers playing in more than 80 venues around Austin over four days, in March.
Though it is an industry-based event, SXSW Music links locally with events such as the annual Austin Music Awards show.

In 1994, SXSW added film and interactive conferences. SXSW Film has become one of the world's premiere film festivals, focusing on new directing talent. Similarly, SXSW Interactive has attracted a strong following among web creators and entrepreneurs. SXSW Interactive's focus on emerging technology has earned the festival a reputation as a breeding ground for new ideas and creative technologies. Twitter launched at SXSW Interactive in 2007.

SXSW is the highest revenue-producing special event for the Austin economy.