| San Nicola Baronia | |
| Official Name: | Comune di San Nicola Baronia |
| Coordinates: | 41.05°N 26°W |
| Province: | (AV) |
| Frazioni: | Ferregne |
| Mayor: | Francesco Colella |
| Area Total Km2: | 6.9 |
| Population Footnotes: | [1] |
| Population Total: | 793 |
| Population As Of: | 31 December 2010 |
| Population Demonym: | Sannicolesi |
| Elevation M: | 610 |
| Postal Code: | 83050 |
| Area Code: | 0827 |
San Nicola Baronia is a town and comune in the province of Avellino, Campania, southern Italy.
Located in the Apennines between the Ufita Valley and Daunian Mountains, the town is part of the Roman Catholic Diocese of Ariano Irpino-Lacedonia. Its territory borders the municipalities of Carife, Castel Baronia, Flumeri, San Sossio Baronia, and Trevico.