Edgar Thomas Conley (April 12, 1874 – August 21, 1956) was an American military officer who was Adjutant General of the United States Army from 1935 to 1938.

Edgar Thomas Conley was born April 12, 1874 in Fairland, Montgomery County, Maryland, United States of America.

Edgar was apparently named for an uncle born in 1840, who was a member of the 2d Maryland (Confederate Army) who died during the American Civil War.

[3] Their son Edgar T. Conley attained the rank of brigadier general in the army and was the husband of Cecile Olive Truesdell.

[5] Edgar Thomas Conley successfully completed his studies at West Point, where he earned the lifetime nickname of "Sheriff" for mediating a fight between cadets, and did well both academically and in extracurricular activities.

Lieutenant Conley was cited for gallantry in the battle, making him eligible to wear the Silver Star Medal when it was approved in 1932.

Captain Conley remained with the 21st Infantry as it returned to the United States, before serving at Fort Niagara, and back in the Philippines.

There, Conley worked as the Chief of the prisoners of war division for the AEF, for which he received a letter of commendation from the Provost Marshal General.

His sound judgment, marked ability, and devotion to duty resulted in the handling of the delicate prisoner of war questions in such a manner as to produce only commendation.