Milton Casper Elstner (1848–1912) was an American lawyer and former confederate soldier from Grant County, Kentucky.

In 1865[1] at the end of the American Civil War he joined one of the first Arkansas regiments (the Third), and was with Ben McCullough and McIntosh when they were killed at the battle of Elk Horn, which was a fight between Sigel and Earl Van Dorn.

[2] Milton received his collegiate education at the University of Kentucky in 1872 graduated from the law department of the same institution.

During the administration of President Arthur he filled the position of United States Attorney for the western district of Louisiana and in July, 1889, was re-appointed to the same office,[4] and his duties have been performed in a manner highly flattering to himself ever since.

He was an able lawyer, with a convincing and eloquent speech, and the reputation he gained was acquired largely through his own individual efforts and at the expense of diligent study and practical experience.