Alan Dwayne Porter Jr. (born December 18, 1977) is an American Major League Baseball umpire.

[2] Porter was the home plate umpire for Jordan Zimmermann's (Washington Nationals) no-hitter against the Miami Marlins on the last day of the 2014 regular season.

[3] Porter's first postseason assignment was the 2014 NLDS between the St. Louis Cardinals and the Los Angeles Dodgers.

Porter was chosen as one of the umpires for the 2019 World Series, his first, between the Houston Astros and the Washington Nationals.

[5] Porter is married to his wife Allison, and they have two sons Alan III (Trey) and Alexander.