Paul Allman Siple (/ˈsaɪpəl/ SIGH-p'l;[1] December 18, 1908 – November 25, 1968) was an American Antarctic explorer and geographer who took part in six Antarctic expeditions, including the two Byrd expeditions of 1928–1930 and 1933–1935, representing the Boy Scouts of America as an Eagle Scout.

With Charles F. Passel he developed the wind chill factor, a term coined by Siple.

After an extensive nationwide search in 1928, he was the first Eagle Scout selected for an Antarctic expedition, sailing with Richard E. Byrd on his ship the City of New York.

He became a brother of the Alpha Chi Rho fraternity while attending Allegheny College, in Meadville, Pennsylvania.

Siple is noteworthy because he is one of a very few individuals to participate in all five of the Antarctic expeditions conducted by Richard E. Byrd.