| Subdivision Type: | Country |
| Subdivision Name: | Brazil |
| Subdivision Type1: | State |
| Subdivision Name1: | Rio Grande do Sul |
| Established Date: | 02/16/1959 |
| Leader Party: | PDT |
| Leader Title: | Prefect |
| Leader Name: | Rogerio Felini Fachinetto |
| Unit Pref: | Metric |
| Area Total Km2: | 271.643 |
| Elevation M: | 750 |
| Population Total: | 10,423 |
| Population As Of: | 2020 [1] |
| Population Density Km2: | auto |
| Population Demonym: | arvorezinhense |
| Timezone1: | BRT |
| Utc Offset1: | -3 |
Arvorezinha (pronounced as /pt/) is a municipality in the state of Rio Grande do Sul, Brazil. It literally means "small tree".
The municipality's first inhabitant was Lino Figueira, who settled in the region c. 1900. Much of the incoming population were Italian immigrants from the nearby cities of Antônio Prado, Veranópolis, Bento Gonçalves, Caxias do Sul and Garibaldi, who started settling during the early 20th century. Before its establishment as a municipality, which was official as of February 16, 1959, the land belonged to Taquari and later Encantado.