| † | These people only sell goods at the market. |
| ‡ | Ghorza gra-Bagol only offers services at the forge located outside the Castle Markarth proper (just north of The Hag's Cure). |
| ^a | These people can die as part of the Taste of Death quest. |
| ^b | These people can die as part of the No One Escapes Cidhna Mine quest. |
| ^c | These people can die as part of the Forsworn Conspiracy quest. |
| ^d | These people can die when you first enter the city. |
| ^e | Vigilant Tyranus can die as part of the House of Horrors quest. |
| ^f | Banning is not a potential follower, but will sell the canine follower Vigilance. |
| ^g | Fjotra only appears after the quest The Heart of Dibella. |
