Terrellians might refer to:
- Terrellian (Alpha Quadrant), the species found in the Alpha Quadrant.
- Terrellian (Delta Quadrant), the species found in the Delta Quadrant.
You might also be looking for:
- Terellian, a four-armed race native to the Alpha and Beta Quadrants.
- Terrelian, a race visiting Deep Space 9 in 2371.
- Tarellian, a humanoid species that suffered a dreadful plague.
- Tyrellian, a species known for its laser art.