List of Famous people named Si

Simon James King is an English television presenter, best known as one half of the Hairy Bikers with Dave Myers. Together they have presented a number of television cookery series for BBC television and have since launched an online weight loss programme, 'The Hairy Bikers Diet Club'.

Silas Merritt Robertson, known as Si Robertson and often referred to as "Uncle Si", is an American television personality and a retired duck-call maker at Duck Commander. He is best known for his role on A&E's Duck Dynasty, on which he has emerged as a breakout cast member. He has also appeared on other shows such as the Outdoor Channel's Buck Commander and The Duckmen of Louisiana, and was the eponymous host of the Duck Dynasty spin-off Going Si-Ral. Si has also made a guest appearance on Last Man Standing, and in Big Idea Entertainment's VeggieTales episode Merry Larry and the True Light of Christmas as Silas the Narrator.

Si Ouey or Si Uey Sae-Ung, commonly spelled Si Quey and whose actual name was Ng Lihui, was a Sino-Thai gardener who became best known as a convicted serial killer. Si Ouey allegedly killed several children throughout the 1950s before being arrested in 1958 and executed in 1959. According to some sources, Si Ouey was the first serial killer in the history of modern Thailand.

Si Pitung was a 19th-century bandit in Batavia, Dutch East Indies. His exploits have since become legendary, with numerous accounts of his life, deeds, and death.

Si Xinliang is a former Chinese politician. From 2010 to 2013, Si served as the Vice Chairman of the Zhejiang Provincial People's Political Consultative Conference, a mostly ceremonial legislative consultation body. Prior to that, Si served as the chief of the Organization Department of the Zhejiang provincial Communist party Committee. He worked for several years under Xi Jinping, who was serving as the party chief of Zhejiang.