| Pilão Arcado | |
| Native Name: | Município de Pilão Arcado |
| Settlement Type: | Municipality |
| Pushpin Map: | Brazil |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location of Pilão Arcado in Brazil |
| Coordinates: | -10.0028°N -42.5039°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name: |  Brazil |
| Subdivision Name1: | Northeast |
| Subdivision Name2: | Bahia |
| Established Title: | Founded |
| Established Date: | 1810 |
| Leader Title: | Mayor |
| Leader Name: | Orgeto Bastos dos Santos |
| Unit Pref: | Metric |
| Area Total Km2: | 11,731.5 |
| Population As Of: | 2020 [1] |
| Population Total: | 35,175 |
| Population Density Km2: | auto |
| Population Demonym: | Pilão-arcadense |
| Timezone1: | BRT |
| Utc Offset1: | -3 |
Pilão Arcado is a municipality in the state of Bahia in the North-East region of Brazil. Pilão Arcado covers 11731.5km2, and has a population of 35,175 with a population density of 3 inhabitants per square kilometer.
Pilão Arcado was originally inhabited by indigenous people of the Mocoase and Acoroase ethnic groups. The first Portuguese inhabitants came from the Guerreiro e Bernardo family, both of Portuguese nobility. A chapel named Santo Antônio do Pilão Arcado and a parish of the same name were established in 1771. The municipality fell into violence between 1842 and 1848. War was declared between the families of Militão Plácido de França Antunes and Captain Bernardo José Guerreiro. The conflict ended on August 1, 1848 with the death of the final adult son of the Guerreiro family. Fighting between the families occurred in both Pilão Arcado and nearby Sento Sé.