Henry Martyn Lazelle (September 8, 1832 – July 21, 1917) was a career officer in the United States Army.

He entered the United States Military Academy in 1850 and was roommates with James MacNeil Whistler, the future artist.

[2][5] Lazelle rejoined the 8th Infantry on Reconstruction duty in the Second Military District, North and South Carolina, from March 1866 to October 1870.

In 1877, Lazelle led a pursuit of Lame Deer's band of Lakota Sioux, and in 1878, he established Fort Meade (South Dakota).

In May 1879, he was named Commandant of Cadets at the United States Military Academy, and was promoted to lieutenant colonel of the 23rd Infantry in June 1881.

Assigned to command the publication of the Official Records of the American Civil War, he returned to Washington, D.C.

He was promoted to colonel of the 18th Infantry in February 1889; he served as commander of the regiment and of the post of Fort Clark until July 1894.

He wrote a number of books, including One Law in Nature: A New Corpuscular Theory, Comprehending Unity of Force, Identity of Matter, & Its Multiple Atom Constitution: Applied to the Physical Affections Or Modes of Energy and Matter, Force, and Spirit; or, Scientific Evidence of a Supreme Intelligence (1895).