Earle H. Clapp (October 15, 1877 – July 2, 1970) was an American forester who served as acting Chief of the United States Forest Service (USFS) of the Department of Agriculture, from December 21, 1939, to January 8, 1943, when Lyle F. Watts was appointed chief.

Clapp began working for the Forest Service in 1905, serving in various capacities, such as timber sales in Wyoming and Montana.

When Ferdinand A. Silcox died in office on December 20, 1939, he was appointed Acting Chief.

Clapp was never officially chief of the agency, as President Roosevelt did not want to approve the appointment.

[2] Roosevelt supported reorganizing and transferring the Forest Service to a new Department of Natural Resources.