While doing some research recently at the Mississippi Department of Archives & History, I found an unprocessed collection in the State Auditor's records of payments made to militia companies in Mississippi in 1860 - 1861. The interesting thing about these vouchers is that many of them included complete rosters of the men in companies. Listed below are the companies that had rosters attached with their vouchers:

Civil War Mississippi Militia Payment Vouchers
Which Include Company Rosters

State Auditor’s Records
RG 29, Box ORUP 349, B1-R227-B2-S2

1. Tippah County Rifles, Capt. Moses McCarley (August 22, 1861)
2. Springport Invincibles, Capt. R.S. Abernathy (November 13, 1861)
3. Crystal Springs Southern Rights, Capt. J.C. Davis (July 6, 1861)
4. Oktibbeha Rescue, Capt. A.J. Maxwell (June 24, 1861)
5. Live Oak Rifles, Capt. J.B. McRae (February 10, 1860)
6. Salem Cavalry, Capt. J.G. Hamer (January 21, 1861)
7. Pine Hill Fire Eaters, Capt. W.L. Davis (March 23, 1861)
8. Shamrock Guards, Capt. J.H. Crump (July 3, 1861)
9. Blackhawk Rifles, Capt. H.J. Reid (August 20, 1861)
10. Hamer Rifles, Capt. C.F. Hamer (May 17, 1861)
11. Wigfall Rifles, Capt. W.F. Brantley (May 18, 1861)
12. Warren Cavalry, Capt. W.C. Raum (August 5, 1861)
13. Fredonia Hards, Capt. A.J. Jones (August 12, 1861)
14. Prairie Guards, Capt. J.W.T. Hairston (February 4, 1861)
15. Sarsfield Southrons, Capt. Felix Hughes (July 11, 1861)
16. Prairie Riflemen, Capt. J.B. Williams (April 8, 1861)
17. Buena Vista Rifles, 1st Lieut. A.J. Pulliam (August 21, 1861)
18. Rifle Scouts, Capt. J.M. Simonton (August 2, 1861)
19. Westville Guards, Lieut. W.J. Douglas (July 19, 1861)
20. Quitman Rifle Guards, Capt. Sam B. Brown (April 8, 1861)
21. Noxubee Rifles, Capt. George T. Wier (February 26, 1861)
22. Chickasaw Guards, Capt. W.F. Tucker (February 18, 1861)
23. Jasper Greys, Capt. James J. Shannon (July 29, 1861)