The A* search algorithm is a pathfinding algorithm used in computing.
A* or A star may also refer to:
- A*, the highest grade in the GCSE, and A-level educational systems
- A* or A*STAR, the Singapore Agency for Science, Technology and Research
- The Eurocopter AS350 helicopter
- A star of spectral class A
- The radio source Sagittarius A* at the center of the Milky Way galaxy, believed to be a supermassive black hole