%%Do not spoiler-tag trope titles. For more details, see Administrivia/HandlingSpoilers.
Due to page length, this page has been split into the following.
'''Spoiler warning:''' Trope titles are not marked as spoilers in this entry. Because of this, the trope listings spoil some events of the plot. If you are not caught up with the latest episodes and you do not wish to be spoiled, do not read past the description of each character, and do not open the Project Castor page if you have not watched up through at least 2x10.
* [[Characters/OrphanBlackProjectLeda The Clones of Project LEDA]][[note]]Sarah Manning, Beth Childs, Alison Hendrix, Cosima Niehaus, Katja Obinger, Helena, Rachel Duncan, Jennifer Fitzsimmons, Tony Sawicki, Charlotte Bowles, Krystal Goderich, M.K., Danielle Fournier, Aryanna Giordano, Janika Zingler, Helsinki clones[[/note]]
* [[Characters/OrphanBlackAssociates Associates of the Clones]][[note]]Felix Dawkins, Vic Schmidt, Siobhan Sadler, Kira Manning, Amelia, Cal Morrison, Benjamin Kertland, Kendall Malone, Art Bell, Paul Dierden, Angela Deangelis, Toronto Police Department, Donnie Hendrix, Gemma and Oscar Hendrix, Aynsley Norris, Jason Kellerman, Marci Coates, Connie Hendrix, Alison's Neighbors, Delphine Cormier, Scott Smith, Shay, Jesse, Pupok[[/note]]
* [[Characters/OrphanBlackTheProletheans The Proletheans]][[note]]Maggie Chen, Tomas, Hank Johanssen, Bonnie Johanssen, Gracie Johanssen, Alexis[[/note]]
* [[Characters/OrphanBlackTheNeolutionists The Neolutionists]][[note]]Dr. Aldous Leekie, Olivier Duval, Astrid, Trina, Evie Cho, Marty Duko[[/note]]
* [[Characters/OrphanBlackDyadAssociates Dyad Associates]][[note]]Andrew Peckham, Susan Duncan, Daniel Rosen, Marian Bowles, Dr. Nealon, Ferdinand, Bulldog[[/note]]
* [[Characters/OrphanBlackProjectCastor The Clones of Project CASTOR]][[note]]Mark Rollins, Miller, Rudy, Seth, Abel Johanssen, Parsons, Ira[[/note]]
* [[Characters/OrphanBlackMiscellaneousCharacters Miscellaneous Characters]][[note]]Bobby, Colin, Ramon, Yvonne, Barry and Brenda, Willard Finch, Dr. Coady, Adele[[/note]]