9th Ohio Infantry Regiment

9th Ohio Infantry Regiment
Ohio state flag
Active	1861–1865
Country	United States of America
Allegiance	Union
Branch	Union Army
Type	Infantry
Size	~950 soldiers (initial)
Nickname(s)	Die Neuner (The Niners)
Engagements	American Civil War Battle of Rich Mountain Battle of Carnifex Ferry Battle of Mill Springs
Commanders
Notable commanders	Col. Robert L. McCook

The 9th Ohio Infantry Regiment was an infantry regiment that was a part of the Union Army during the American Civil War. The members of the regiment were primarily of German descent and the unit was the first almost all-German unit to enter the Union Army.