| Arroio do Só | |
| Settlement Type: | Bairro |
| Mapsize: | 250px |
| Image Map1: | distrito.Arroio do Só.Santa Maria.RS.v2006.png |
| Mapsize1: | 250px |
| Map Caption1: | District of Arroio do Só, in Santa Maria City, Rio Grande do Sul, Brazil |
| Coordinates: | -29.7921°N -53.5663°W |
| Subdivision Type: | Country |
| Subdivision Name: | Brazil |
| Subdivision Type1: | State |
| Subdivision Name1: | Rio Grande do Sul |
| Subdivision Type2: | Municipality/City |
| Subdivision Name2: | Santa Maria |
| Subdivision Type3: | District |
| Subdivision Name3: | District of Arroio do Só |
| Area Total Km2: | 159.30 |
| Area Total Sq Mi: | 61.51 |
| Population Footnotes: | [1] |
| Population Total: | 944 |
| Population Density Km2: | auto |
| Population Density Sq Mi: | auto |
| Postal Code: | 97.165-000 |
| Blank1 Name Sec1: | Adjacent bairros |
| Blank1 Info Sec1: | Palma, Pains, Passo do Verde. |
| Website: | Official site of Santa Maria |
Arroio do Só[2] ("rivulet of the hermit") is a bairro in the District of Arroio do Só in the municipality of Santa Maria, in the Brazilian state of Rio Grande do Sul. It is located in east Santa Maria.
The bairro contains the following villages: Água Boa, Alto dos Mários, Arroio do Só, Coitado, Parada João Alberti, Picada do Arenal, Rincão dos Becos, Rincão dos Pires, Rincão Nossa Senhora Aparecida, São Geraldo, Tronqueiras, Vila Arroio do Só and Vila Silva.