Sigel's Second Brigade ^[28]

Colonel Franz Sigel, Commander

• Third Missouri Volunteer Infantry Regiment (550) – Lieutenant-Colonel Francis Hassendeubel
• Fifth Missouri Volunteer Infantry Regiment (400) – Colonel Charles E. Salomon
• Two artillery batteries (4 guns each) – Major Franz Backoff

Missouri State Guard ^[29]

Claiborne Fox Jackson, Commander

Major-General Sterling Price was not present during the Battle of Carthage because he had headed south to enlist support from the Confederates under Brigadier-General Ben McCulloch. Although Missouri Governor Claiborne Fox Jackson was in overall command, he may have delegated operational command to Brigadier-General James Spencer Rains. If that was the case, then command of the Eighth Division would have devolved to Colonel Richard H. Weightman.

• Third Division (365 infantry) – Brigadier-General John B. Clark, Sr.
• Fourth Division (1,200 infantry and cavalry) – Brigadier-General William Y. Slack
• 1st Missouri: Colonel John T. Hughes, Lieutenant-Colonel James Pritchard
• Thornton's Battalion: Major John C. Thornton
• 1st Cavalry: Colonel Benjamin A. Rives
• Sixth Division (650) – Brigadier-General Mosby Parsons
• Guibor's Battery (4 guns) – Captain Henry Guibor
• Eighth Division (1,812 infantry and cavalry) – Brigadier-General James Spencer Rains (Colonel Richard H. Weightman)
• Bledsoe's Battery (3 guns): Captain Hiram M. Bledsoe
• There were also approximately 2,000 unarmed recruits that stayed in the rear during the battle.