| Sveti Jakov | |
| Other Name: | San Giacomo Lussignano |
| Settlement Type: | Village |
| Pushpin Map: | Croatia |
| Coordinates: | 44.6401°N 14.3935°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Croatia |
| Subdivision Type1: | County |
| Subdivision Name1: | Primorje-Gorski Kotar |
| Subdivision Type2: | Town |
| Subdivision Name2: | Mali Lošinj |
| Area Footnotes: | [1] |
| Area Total Km2: | 7.4 |
| Population As Of: | 2021 |
| Population Total: | 74 |
| Population Density Km2: | auto |
| Timezone: | CET |
| Timezone Dst: | CEST |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 51554 |
| Area Code: | 051 |
| Registration Plate: | RI |
Sveti Jakov (Italian: San Giacomo Lussignano) is a village on the Croatian island of Lošinj, in Primorje-Gorski Kotar. Administratively, it is part of the town of Mali Lošinj. As of 2021, it had a population of 74. Located to the south of Nerezine, it is connected by the Croatian D100 highway.