| Legislative Assembly of Piauí | |
| Native Name: | Assembleia Legislativa do Piauí |
| Coa Pic: | Brasão do Piauí.svg |
| Coa Res: | 100px |
| House Type: | Unicameral |
| Members: | 30 deputies |
| Structure1 Res: | 250px |
| Session Res: | 250px |
| Meeting Place: | Teresina, Piauí, Brazil |
The Legislative Assembly of Piauí (Portuguese: Assembleia Legislativa do Piauí) is the unicameral legislature of the Brazilian state of Piauí. The assembly, which is seated in the state capital of Teresina, is composed of has 30 state deputies elected by proportional representation.