There are several organisations in Skyrim that a player will encounter during the game.
 Joinable Factions
The following factions can be joined by the player. In all of the following the player can rise to the highest rank by completing a series of quests.
- Imperial Legion or Stormcloaks (mutually exclusive)
- Bards College
- College of Winterhold
- Dark Brotherhood
- Thieves' Guild
 The Elder Scrolls V: Dawnguard
 NPC Factions
These factions are those that cannot be joined by the player, but can be interacted with.