| L'Arena | |
| Other Name: | San Juan de la Arena (Spanish) |
| Settlement Type: | Parish |
| Population Total: | 1387[1] |
| Population As Of: | 2023 |
| Subdivision Type: | Country |
| Subdivision Name: | Spain |
| Subdivision Type1: | Region |
| Subdivision Name1: | Asturias |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Soto del Barco |
| Postal Code: | 33125 |
| Postal Code Type: | Postal code |
L'Arena, also known by its Spanish name, San Juan de la Arena, is one of the five parishes of Soto del Barco, a municipality within the province and autonomous community of Asturias, in northern Spain. It is situated near the mouth of the river Nalón, which flows into the Cantabrian Sea. Los Quebrantos Beach is also located within the parish.