| Serrinha | |
| Settlement Type: | Municipality of Bahia, Brazil |
| Image Alt: | Aerial view of downtown Serrinha |
| Flag Alt: | Flag of Serrinha |
| Shield Alt: | Coat of arms of Serrinha |
| Map Alt: | Location of Serrinha in Bahia |
| Pushpin Map: | Brazil#South America |
| Pushpin Relief: | yes |
| Subdivision Type: | Country |
| Subdivision Name: |  Brazil |
| Subdivision Type1: | Region |
| Subdivision Type2: | State |
| Subdivision Name1: | Northeast |
| Established Title: | Founded |
| Established Date: | 13 June 1876[1] |
| Leader Title1: | Mayor |
| Leader Name1: | Cyro Oliveira Silva Novais (MDB) (2025-2028)[2] [3] |
| Leader Title2: | Vice Mayor |
| Leader Name2: | Givaldo da Silva Lopes (PT) (2025-2028) |
| Area Total Km2: | 583.314 |
| Elevation M: | 379 |
| Population As Of: | 2022 |
| Population Total: | 80435[4] |
| Population Density Km2: | 137.89 |
| Population Demonym: | Serrinhense (Brazilian Portuguese) |
| Timezone: | Brasília Time |
| Utc Offset: | -03:00 |
| Postal Code Type: | Postal code |
| Postal Code: | 48700-000[5] |
| Blank Name: | HDI (2010) |
| Blank Info: | 0.634 – medium |
| Website: | serrinha.ba.gov.br |
"Serrinha" is also the name of a microregion in Bahia.Serrinha is a city in the state of Bahia, in eastern Brazil.
The population is 81,286 people.[6] The mayor is Adriano Lima of the Brazilian Social Democracy Party.
The city is the seat of the Roman Catholic Diocese of Serrinha.
The town's founding date is 13 June 1876.