Robert N. Krentz Jr. was a prominent rancher in the U.S. state of Arizona. Active in a family cattle ranching business stretching back nearly 100 years, he and his family ranch were inducted into the Arizona Farming and Ranching Hall of Fame in 2008. Krentz was featured several times during the 1990s and 2000s (decade) in media reports regarding the problems surrounding illegal immigration across the Arizona stretch of the United States – Mexico border, particularly regarding its impact on ranching.