William Thomas Tyndall (January 16, 1862 – November 26, 1928) was a U.S. Representative from Missouri's 14th congressional district.

William T. Tyndall
William T. Tyndall photographed by C. M. Bell Studio
Member of the U.S. House of Representatives from Missouri's 14th district
In office March 4, 1905 – March 3, 1907
Preceded by	Willard D. Vandiver
Succeeded by	Joseph J. Russell
Personal details
Born	(1862-01-16)January 16, 1862 Sparta, Missouri, U.S.
Died	November 26, 1928(1928-11-26) (aged 66) Bartlesville, Oklahoma, U.S.
Political party	Republican

Born in Sparta, Missouri, Tyndall attended the public schools, Henderson Academy at Sparta, and Sparta Academy. He engaged in teaching at Sparta in 1884–1895. He studied law. He was admitted to the bar in 1893 and commenced practice in Sparta. He was appointed postmaster of Sparta, Missouri, by President Harrison and served from March 23, 1891, to November 14, 1893. He was again appointed postmaster by President McKinley, and served from December 8, 1897, to January 7, 1905.

Tyndall was elected as a Republican to the Fifty-ninth Congress (March 4, 1905 – March 3, 1907). He was an unsuccessful candidate for reelection in 1906 to the Sixtieth Congress. He resumed the practice of law in Sparta, Missouri. He moved to Bartlesville, Oklahoma, in 1912 and continued the practice of law until his death there November 26, 1928. He was interred in a mausoleum in White Rose Cemetery.