| Official Name: | Cajueiro da Praia |
| Subdivision Type: | Country |
| Subdivision Name: | Brazil |
| Subdivision Type1: | Region |
| Subdivision Name1: | Northeast |
| Subdivision Type2: | State |
| Subdivision Name2: | Piauí |
| Leader Title: | Mayor |
| Leader Name: | Girvaldo Albuquerque da Silva |
| Area Total Km2: | 271.348 |
| Population As Of: | 2020 [1] |
| Population Total: | 7,674 |
| Population Density Km2: | 22.7 |
| Timezone: | BRT |
| Utc Offset: | -3 |
| Coordinates: | -2.9278°N -41.3358°W |
Cajueiro da Praia is one of the four coastal cities of Piauí, Brazil.
The municipality contains part of the Delta do Parnaíba Environmental Protection Area, created in 1996.
The city is home to the Cashew of A Praia (Cajueiro da Praia), which is either the largest cashew tree in the world, at 8800m2, or the second largest, after the Cashew of Pirangi. The tree has been studied by the State University of Piauí.[2]