Khoo Thean Teik (Chinese: 邱天德; Pe̍h-ōe-jī: Khu Thian-tek; 1826—1891) was one of the most powerful and notorious Hokkien leaders of 19th-century Penang.

He was the leader of the Tokong or Khian Teik society that was involved in the Penang Riots of 1867 and through its connection with the Hai San, the internecine Larut Wars of 1861 to 1874.

Apart from the monopolies for tobacco, liquor, opium and gambling revenue farming in Perak that these two jointly obtained from Sir Hugh Low, British Resident at Perak in 1889, they were both heads of their respective secret societies which were allied against their common foe, the Ghee Hin.

Chung, Keng Quee and Khoo Thean Teik together represented the allied Haisan-Khianteik group of Perak Hakkas and Penang Hockiens.

Khoo Thean Teik aided by Koh, Seang Thye on one occasion supplied $60,000 in goods, money and ammunition to Chung, Keng Quee and Tan, Yit Hoon for their mining activities and for their military activities against the Ghee Hin in return for seven-tenths of the percentage of the tin they produced.