| Official Name: | Arenillas Canton |
| Settlement Type: | Canton |
| Image Map1: | Cantones de El Oro.png |
| Map Caption1: | Cantons of El Oro Province |
| Subdivision Type: | Country |
| Subdivision Name: |  Ecuador |
| Subdivision Name1: | El Oro Province |
| Subdivision Type2: | Capital |
| Unit Pref: | Imperial |
| Population As Of: | 2001 |
| Timezone: | ECT |
| Utc Offset: | -5 |
| Coordinates: | -3.55°N -80.06°W |
Arenillas Canton is a canton of Ecuador, located in the El Oro Province. Its capital is the town of Arenillas. Its population at the 2001 census was 22,477.[1]
Ethnic groups as of the Ecuadorian census of 2010:[2]