The 2019 WBSC Premier12 was an international baseball championship featuring the 12 highest-ranked national teams in the world, held by the World Baseball Softball Confederation (WBSC). It was the second WBSC Premier12 event. The championship was held from November 2 to 17, 2019, in Mexico, South Korea, Taiwan, and Japan.

The World Baseball Softball Confederation (WBSC) is the world governing body for the sports of baseball, softball, and Baseball5. It was established in 2013 by the merger of the International Baseball Federation (IBAF) and International Softball Federation (ISF). Under the WBSC's organizational structure, the IBAF and ISF now serve as the confederation's baseball and softball divisions, respectively. Each division is governed by an executive committee, while the WBSC is governed by an executive board.