|First appearance||"Gray Matter" (episode 4.05)|
|Last appearance||"Exeunt Omnes" (episode 6.08)|
|Reason/Cause||End of Series|
|Episode Count||15 Episodes|
|Portrayed by||Cyrus Farmer|
He first appears as one of the several African American corrections officers to work in Emerald City under the management of Martin Querns. He is one of the few corrections officers seen who openly shows favoritism towards the African American inmates throughout the series.
After Querns is fired, Johnson works mainly in Unit B, occasionally seen in Em City and the library. Later when Wilson Loewen comes to Oz for assisting the Ku Klux Klan in the 1963 killing of two ten-year old black girls, Johnson goes along with Governor Devlin's African American assistant Perry Loftus in causing a cover-up murder of the mayor who blackmails Devlin for a pardon. The cover-up gets complicated to the point that Leo Glynn discovers Johnson's role where he then pays an inmate Lionel Kelsch to murder him. As Glynn is murdered, Johnson rats out the governor's assistant and goes home free.
- Wilson Loewen: Throat slashed to death by Willy Brandt by orders also from Perry Loftus and James Devlin. (2003)
- Willy Brandt: Stabbed to death by Lionel Kelsch by orders also from Perry Loftus and James Devlin for turning in Officer Johnson. (2003)
- Leo Glynn: Stabbed to death by Lionel Kelsch by orders also from Perry Loftus and James Devlin. (2003)
Warden Leo Glynn - Tim McManus - Sister Peter Marie Reimondo - Gloria Nathan - Father Ray Mukada - Martin Querns - Lenny Burrano - Dr. Tariq Faraj - Diane Wittlesey - Sean Murphy - Claire Howell - Clayton Hughes - Karl Metzger - Andrea Phelan - Dave Brass - Len Lopresti - Eugene Rivera - Adrian Johnson - Travis Smith - Joseph Mineo - Jason Armstrong - Mike Healy - Gordon Wood - Eddie Hunt - Tom Robinson - Rick Heim - Vic D'Agnasti - Anthony Nowakowski - Lawrence Smith - Joseph Howard - Roger Brese - Carol Grace - Suzanne Fitzgerald