The 2009 Big 12 Conference women's basketball tournament was the 13th edition of the Big 12 Conference's annual championship tournament, held at the Cox Convention Center in Oklahoma City from March 12 until March 15, 2009.

The Tournament Champion, Baylor's Lady Bears, received an automatic bid to the 2009 NCAA Women's Division I Basketball Tournament.

Seeding was based on regular season records.

It was run simultaneously with the 2009 Big 12 Conference men's basketball tournament.

Most Outstanding Player – Jessica Morrow, Baylor[5]