Herbert Deakyne (December 29, 1867 – May 28, 1945) was a United States Army officer and engineer in the late 19th and early 20th centuries.

Deakyne was born on December 29, 1867,[1] in Deakyneville, Delaware, a location settled by his ancestors around 1700.

[2] Graduating from the United States Army War College in 1917, Deakyne went on a tour of duty to France in August of that year, commanding the Tenth Railway Engineers in Saint-Nazaire until January 1918.

[2] He received a temporary promotion to brigadier general on October 13, 1918, and reverted to his permanent rank of lieutenant colonel on May 31, 1919.

After his retirement, Deakyne and his wife lived at her family's estate on Humboldt Bay near Samoa, California and then in San Francisco.