Eugene Frederick Ladd (September 19, 1859 – April 23, 1927) was a career officer in the United States Army.

[1][3] Ladd performed frontier duty at Fort Riley, Kansas, and Indian Territory from September 1884 to June 1885.

[5] From March 1899 to May 1901, Ladd served in the U.S. Military Government in Cuba as treasurer and auditor of Cuban Customs.

[5] Ladd served as constructing quartermaster at Fort Trumbull, New London, Connecticut, from July 1901 to June 1905.

[5] In this post, he was responsible for supervising creation of several Coast Artillery positions built to defend Long Island Sound.

[5] He served as military secretary and adjutant of the War Department general staff from June 1905 to April 1908.

[1][2][5] During this posting, Ladd was appointed by Army Chief of Staff J. Franklin Bell to work with Captain Dwight E. Aultman to develop reliable sources for military intelligence in the Philippines.

[1][3] They were the parents of daughter Katharine, the wife of Army officer William Torbert MacMillan.