Yang Shidao (died 647), courtesy name Jingyou, posthumously known as Duke Yi of Ande, was a Chinese politician who served as a chancellor during the reign of Emperor Taizong in the Tang dynasty.
His older brother Yang Gongren served as an official during both the Sui and Tang dynasty and who briefly served as chancellor during the reign of Tang's founder Emperor Gaozu.
(It is not completely clear whether Yang's travel to Chang'an was before or after Zheng's fall to Tang in 621, but likely before.)
Emperor Gaozu gave Yang Shidao his daughter Princess Guiyang in marriage.
In 639, he became Zhongshu Ling (中書令), the head of the legislative bureau and also considered a post for a chancellor.
Yang was therefore demoted to the post of minister of civil service affairs, no longer a chancellor.