William Allan Oldfield (February 4, 1874 – November 19, 1928) was an American lawyer and politician who served as a U.S. Representative from Arkansas from 1909 until his death.

[1] He graduated in 1896 and became a school teacher and principal in Richmond, Arkansas, while also studying law.

[1] In 1898, Oldfield enlisted for the Spanish–American War as a private in Company M, 2nd Arkansas Infantry Regiment.

[1] After returning home, Oldfield graduated from Cumberland University's law school in Lebanon, Tennessee, in 1900, attained admission to the bar, and commenced practice in Batesville.

[1] Oldfield won reelection to the 71st Congress in 1928, but died before the term started in March 1929.