William Frederick Milton Arny (May 9, 1813 – September 18, 1881) was an Indian agent for the United States, who served as Secretary of New Mexico Territory in 1862–1867.
[4] Arny also served as a delegate to the Leavenworth Constitutional Convention and was a member of the 1858 Kansas Territorial legislature, as well as the Topeka legislature[5] He moved to New Mexico after he was appointed United States Indian agent for the Utes and Jicarilla, Native-American tribes in northern New Mexico, replacing Kit Carson.
[6] In December 1861, Arny made a trip to Washington, D.C. to voice his plans and ideas to the Bureau of Indian Affairs.
[7] In July 1862, President Lincoln made him Secretary of the New Mexico Territory, and he settled at Santa Fe and served in this capacity for the next five years.
W. F. M. Arny died September 18, 1881, in Topeka, Kansas where he lived for the last five years of his life on a tight budget.