| Maryland River | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Australia |
| Subdivision Type2: | State |
| Subdivision Name2: | New South Wales |
| Subdivision Type3: | IBRA |
| Subdivision Name3: | New England Tablelands |
| Subdivision Type4: | District |
| Subdivision Name4: | Northern Tablelands |
| Subdivision Type5: | local government area |
| Subdivision Name5: | Tenterfield |
| Length: | 65km (40miles) |
| Source1: | Great Dividing Range |
| Source Confluence: | Maryland Creek and Ruby Creek |
| Source Confluence Location: | near Maryland |
| Source Confluence Elevation: | 821m (2,694feet) |
| Mouth: | confluence with Boonoo Boonoo River to form the Clarence River |
| Mouth Location: | east of Rivertree |
| Mouth Elevation: | 249m (817feet) |
| River System: | Clarence River catchment |
| Tributaries Left: | Five Mile Creek (New South Wales), Cullendore Creek |
| Tributaries Right: | Herding Yard Creek, Billys Creek |
| Custom Label: | National park |
| Custom Data: | Maryland National Park |
| Extra: | [1] |
Maryland River is a watercourse of the Clarence River catchment in the Northern Tablelands district of New South Wales, Australia. Its upper reaches run close to the border between New South Wales and Queensland.
Formed through the confluence of Maryland Creek and Ruby Creek, Maryland River rises on the slopes of the Great Dividing Range, near Maryland, and flows generally northeast and then southeast, joined by four minor tributaries before reaching its confluence with the Boonoo Boonoo River to form the Clarence River, east of Rivertree. The river descends over its course;[1] and flows through the Maryland National Park in its upper reaches.