| Stewarts Brook | |
| Name Other: | North Arm of Stewarts Brook |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | New South Wales |
| Subdivision Type3: | Region |
| Subdivision Name3: | Sydney Basin (IBRA), Upper Hunter |
| Subdivision Type5: | Local government area |
| Subdivision Name5: | Upper Hunter |
| Length: | 33km (21miles) |
| Source1: | Mount Barrington, Mount Royal Range |
| Source1 Location: | Barrington Tops National Park |
| Source1 Elevation: | 1100m (3,600feet) |
| Mouth: | confluence with the Hunter River |
| Mouth Location: | northeast of Belltrees |
| Mouth Elevation: | 313m (1,027feet) |
| River System: | Hunter River catchment |
| Tributaries Left: | Carters Brook (New South Wales), Cadiangullong Creek, Spring Gully (Stewarts Brook) |
| Custom Label: | National park |
| Custom Data: | Barrington Tops NP |
| Extra: | [1] |
Stewarts Brook, a perennial stream of the Hunter River catchment, is located in the Hunter region of New South Wales, Australia.
Officially designated as a river, the Stewarts Brook rises below Mount Barrington on the western slopes of Mount Royal Range. The river flows generally west northwest, joined by three minor tributaries, before reaching its confluence with the Hunter River northeast of the locality of Belltrees, east of . Stewarts Brook descends over its course.[1]