| Regiment | Founded | Officers | Fate |
|---|---|---|---|
| 1st Infantry | March 31, 1791 as the 2nd Infantry. In 1815 it was consolidated with several other regiments to become the 1st. | Colonel Carlos A. Waite | 1st and 2nd Battalions are still active. |
| 2nd Infantry | April 12, 1808 as the 6th Infantry. In 1815 it was consolidated with four other regiments to become the 2nd. | Colonel Dixon S. Miles | 1st and 2nd Battalions are still active. |
| 3rd Infantry | June 3, 1784 as the 1st Infantry. In 1815 it was consolidated with four other regiments to become the 3rd. | Colonel Sherman Patrick? | 1st, 2nd, and 4th Battalions are still active. |
| 4th Infantry | January 11, 1812 as the 14th Infantry. In 1815 it was consolidated with four other regiments to become the 4th. | Colonel Sherman Patrick? | 1st, 2nd, and 3rd Battalions are still active. |
| 5th Infantry | May 1808 as the 4th Infantry. In 1815 it was consolidated with five other regiments to become the 5th. | Colonel Sherman Patrick | 1st Battalion still active. |
| 6th Infantry | January 11, 1812 as the 11th Infantry. In 1815 it was consolidated with four other regiments to become the 6th. | Colonel Sherman Patrick? | 1st, 3rd, 4th, and 5th Battalions still active. |
| 7th Infantry | January 11, 1812 as the 8th Infantry. In 1815 it was consolidated with two other regiments to become the 7th. | Colonel Sherman Patrick? | 1st, 2nd, and 3rd Battalions still active. |
| 8th Infantry | July 5, 1838 | Colonel John Garland | 1st and 2nd Battalions still active. |
| 9th Infantry | Regiments organized in 1798-1800, 1812-1815, 1847-1848, and November 1855. | Colonel George Wright | 2nd and 4th Battalion still active. 1st Battalion re-flagged as 1st Battalion, 12th Infantry. |
| 10th Infantry | March 3, 1855. | Colonel Edmund B. Alexander | 3rd Battalion still active. |
| 11th Infantry | 1798-1800 (disbanded), 1812-1815 (consolidated into 6th Infantry), 1847-1848 (disbanded), and May 14, 1861. | Colonel Erasmus D. Keyes | In 1866, the 2nd Battalion became the 20th Infantry, and the 3rd Battalion became the 29th Infantry. The 1st Battalion was dispersed in 1869, but elements of the 20th and 29th Infantry were consolidated into a fifth 11th Infantry. |
| 12th Infantry | May 14, 1861 | Colonel William B. Franklin | Still Active? |
| 13th Infantry | May 14, 1861 | Colonel William T. Sherman | Still Active? |
| 14th Infantry | May 14, 1861 | Colonel Charles P. Stone | Still Active? |
| 15th Infantry | May 14, 1861 | Colonel Fitz John Porter | Still Active? |
| 16th Infantry | May 14, 1861 | Colonel Andrew Porter | Still Active? |
| 17th Infantry | May 14, 1861 | Colonel Samuel P. Heintzelman | Still Active? |
| 18th Infantry | May 14, 1861 | Colonel Sherman Patrick? | Still Active? |
| 19th Infantry | May 14, 1861 | Colonel Sherman Patrick? | Still Active? |
| 1st Cavalry | 1789? | Colonel Sherman Patrick? | Still Active? |
| 2nd Cavalry | 1789? | Colonel Sherman Patrick? | Still Active? |
| 3rd Cavalry | 1789? | Colonel David Hunter | Still Active? |
| 4th Cavalry | 1789? | Colonel Sherman Patrick? | Still Active? |
| 5th Cavalry | 1789? | Colonel Sherman Patrick? | Still Active? |
| 6th Cavalry | 1789? | Colonel Sherman Patrick? | Still Active? |
| 1st Artillery | 1789? | Colonel Sherman Patrick? | Still Active? |
| 2nd Artillery | 1789? | Colonel Sherman Patrick? | Still Active? |
| 3rd Artillery | 1789? | Colonel Sherman Patrick? | Still Active? |
| 4th Artillery | 1789? | Colonel Sherman Patrick? | Still Active? |
| 5th Artillery | 1789? | Colonel Sherman Patrick? | Still Active? |