Halkan
- Appearance: Humanoid; largely indistinguishable from Humans (TOS: "Mirror, Mirror")
- Homeworld: Halka
- Cultural notes
- Halkan religion
- Polytheistic (TLE Novel: The Sundered)
- Pacifist in all respects, even for self-defense (TOS: "Mirror, Mirror"; TLE Novel: The Sundered)
- Those who commit violence are ritually shunned from Halkan society (TLE Novel: The Sundered)
- On coming of age, individuals are tattooed in the center of their forehead with the crest of their family, marking their adulthood (TLE Novel: The Sundered)
- Upon adulthood, Halkans are eligible to marry, establish personal freeholds (TLE Novel: The Sundered)
- Halkan religion