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| Series Cast Summary (33 of 225) (View more cast) | Episode
Count | Year
Range | STARmeter™ |
| Ernie Hudson ... Warden Leo Glynn | 56 | (1997-2003) | 2,083 |
| Harold Perrineau ... Augustus Hill | 56 | (1997-2003) | 2,727 |
| Lee Tergesen ... Tobias Beecher | 56 | (1997-2003) | 3,526 |
| J.K. Simmons ... Vern Schillinger | 56 | (1997-2003) | 959 |
| Dean Winters ... Ryan O'Reily | 56 | (1997-2003) | 3,822 |
| Terry Kinney ... Tim McManus | 55 | (1997-2003) | 4,398 |
| Rita Moreno ... Sister Peter Marie Reimondo | 52 | (1997-2003) | 3,807 |
 | George Morfogen ... Bob Rebadow | 51 | (1997-2003) | 21,273 |
| Eamonn Walker ... Kareem Said | 50 | (1997-2003) | 2,484 |
| B.D. Wong ... Father Ray Mukada | 47 | (1997-2003) | 3,549 |
| Kirk Acevedo ... Miguel Alvarez | 46 | (1997-2003) | 2,826 |
| Philip Scozzarella ... Officer Joseph Mineo / ... | 46 | (1997-2003) | 51,875 |
| Scott William Winters ... Cyril O'Reily | 45 | (1998-2003) | 5,473 |
| Lauren Vélez ... Dr. Gloria Nathan | 42 | (1997-2003) | 1,824 |
| Chuck Zito ... Chucky Pancamo | 41 | (1998-2003) | 13,758 |
| Otto Sanchez ... Chico Guerra | 40 | (1998-2003) | 25,670 |
| Tom Mardirosian ... Agamemnon Busmalis | 39 | (1998-2003) | 17,904 |
| Christopher Meloni ... Chris Keller | 38 | (1998-2003) | 1,564 |
| Granville Adams ... Zahir Arif | 37 | (1997-2003) | 41,260 |
| Craig muMs Grant ... Poet | 37 | (1997-2003) | 20,329 |
| Carl DiMaggio ... Officer Len Lopresti / ... | 34 | (1999-2003) | 55,762 |
| Evan Seinfeld ... Jaz Hoyt | 33 | (1998-2003) | 4,957 |
| Adewale Akinnuoye-Agbaje ... Simon Adebisi | 32 | (1997-2000) | 1,036 |
| Robert Clohessy ... Officer Sean Murphy | 32 | (1999-2003) | 15,573 |
| Timothy L. Brown ... Officer Jason Armstrong | 32 | (1997-2003) | 118,968 |
| Kristin Rohde ... Officer Claire Howell | 30 | (1999-2003) | 27,179 |
| R.E. Rodgers ... James Robson | 29 | (1998-2002) | 23,631 |
| Zeljko Ivanek ... Governor James Devlin / ... | 27 | (1997-2003) | 3,863 |
| David Zayas ... Enrique Morales | 27 | (2000-2003) | 1,433 |
| Steven Wishnoff ... Tony Masters | 27 | (1999-2003) | 53,121 |
| Sean Dugan ... Timmy Kirk | 26 | (1998-2003) | 39,188 |
| Edie Falco ... Officer Diane Whittlesey | 23 | (1997-2000) | 2,574 |
| J.D. Williams ... Kenny Wangler | 23 | (1997-2000) | 7,551 |
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