Larry Louis Poncino (February 3, 1957 – July 14, 2024) was an American umpire in Major League Baseball.

His Major League umpiring debut came on July 11, 1985, and his last game was on September 30, 2007.

[1] Poncino wore uniform number 13 during his National League stint, then changed to 39 when the NL and AL umpiring staffs merged in 2000.

Poncino was the plate umpire for Dennis Martínez's perfect game on July 28, 1991.

[2] On June 28, 2007, Poncino was the home plate umpire when Craig Biggio got his 3,000th hit against the Colorado Rockies.