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

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.

He was an unsuccessful candidate for reelection in 1906 to the Sixtieth Congress.

He moved to Bartlesville, Oklahoma, in 1912 and continued the practice of law until his death there November 26, 1928.