Affinity may refer to:

• Affinity (law), kinship by marriage
• Affinity (canon law), a relationship arising from the sexual intercourse of a man and a woman
• Chemical affinity
• Electron affinity
• Processor affinity
• Affinity laws, in hydraulics, used to express the relationship between variables involved in pump performance
• Affinity (Christian organisation), formerly known as the British Evangelical Council
• Affinity (Fire Emblem), the numerous bonuses units have from sharing support conversations with one another.
• Affinity (Stargate SG-1), a season 8 episode of Stargate SG-1.

See also

• Affine

Affinität | Affinité