Baron Adolph Wilhelm August Friedrich von Steinwehr (September 25, 1822 – February 25, 1877) was a German-Brunswick army officer who emigrated to the United States, became a geographer, cartographer, and author, and served as a Union general in the American Civil War.

He served as an engineer in the United States Coast Survey, surveying the United States–Mexico border and Mobile Bay, Alabama, but his desire to serve in a combat position in the Mexican–American War was denied and he returned to Brunswick in 1849, but not before marrying 19-year-old Florence Mary of Mobile, Alabama.

He was promoted to brigadier general on October 12, 1861, and commanded the 2nd Brigade of Louis Blenker's division of the Army of the Potomac.

This brigade was moved into Maj. Gen. John C. Frémont's Mountain Department on April 1, 1862, and it fought in the Valley Campaign against Maj. Gen. Thomas J.

At Chancellorsville, Steinwehr's division had one brigade, that of Col Adolphus Buschbeck involved in resisting Jackson's attack.

They served under Maj. Gen. Joseph Hooker in the Battle of Wauhatchie, where the brigade of Col Orland Smith from Steinwehr's division distinguished itself.

That corps fought under Maj. Gen. William T. Sherman in the Atlanta Campaign and March to the Sea, but Steinwehr was essentially reorganized out of his job and he commanded no more combat units during the war.