2019 Baseball Hall of Fame balloting

Elections to the National Baseball Hall of Fame for 2019 proceeded according to rules most recently amended in 2016. As in the past, the Baseball Writers' Association of America (BBWAA) voted by mail to select from a ballot of recently retired players. The results were announced on January 22, 2019, with the BBWAA electing Mariano Rivera, Roy Halladay, Edgar Martínez, and Mike Mussina to the Hall of Fame. Rivera and Halladay were elected in their first year of eligibility, while Martínez was elected in his last year of eligibility. Rivera became the first player to be unanimously elected, appearing on all 425 ballots; he broke Ken Griffey Jr.'s record of 99.32 percent (437 out of 440), set in 2016.

The Today's Game Era Committee, one of four voting panels that since 2016 had taken over the role of the more broadly defined Veterans Committee, convened on December 9, 2018, to select from a ballot of retired players and non-playing personnel who made their greatest contributions to the sport after 1987, with Lee Smith and Harold Baines elected by this body. The formal induction ceremony was held at the Hall's facilities in Cooperstown, New York, on July 21, 2019.

BBWAA election

The BBWAA election rules remained identical to those that were in effect for the most recent elections. The most recent rules change, announced in 2015, tightened the qualifications for the BBWAA electorate. Beginning with the 2016 election, eligible voters must not only have 10 years of continuous BBWAA membership, but also be currently active members, or have held active status within the 10 years prior to the election.