Service men in Johnson County, Missouri served in various regiments. Men often
 joined a company (within a regiment)  that originated in their county. Listed below
 are companies that were specifically formed in Johnson County, Missouri:

- 4th Regiment, Missouri Cavalry - Confederate, Company D

- 4th Regiment, Missouri Cavalry - Confederate, Company E

- 4th Regiment, Missouri Cavalry - Confederate, Company G

- 5th Regiment, Missouri Cavalry - Confederate, Company F

- 5th Regiment, Missouri Cavalry - Confederate, Company G

- 5th Regiment, Missouri Cavalry - Confederate, Company H

- 16th Regiment, Missouri Cavalry - Confederate, Company D

- 5th Provisional Regiment, Enrolled Missouri Militia (Union), Company B

- 6th Regiment, Missouri Cavalry - Confederate, Company K

- 7th Regiment, Missouri State Militia Cavalry (Union), Company G

- Pindall's Battalion, Missouri Sharpshooters - Confederate, Company A

- 40th Regiment, Enrolled Missouri Militia (Union), Company B

- 40th Regiment, Enrolled Missouri Militia (Union), Company G

- 13th Regiment, Missouri Cavalry (Union), Company H

- 13th Regiment,Missouri Cavalry (Union), Company M

 See this offsite link to view some of the rosters of Missouri soldiers in the civil war
 collected by Tom Caulley.
 Civil War Units Rosters