| Șimon | |
| Pushpin Map: | Romania |
| Subdivision Type1: | Country |
| Subdivision Name1: | Romania |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Brașov County |
| Subdivision Type3: | Villages |
| Subdivision Name3: | Șimon, Bran |
| Length: | 15km (09miles) |
| Source1: | Bucegi Mountains |
| Mouth: | Turcu |
| Mouth Location: | Bran |
| Mouth Coordinates: | 45.5106°N 25.355°W |
| Progression: | Turcu→ |
| Basin Size: | 38km2 |
| Tributaries Left: | Valea lui Lambă |
| Custom Label: | River code |
| Custom Data: | VIII.1.50.4.3 |
The Șimon (in its upper course also: Gaura) is a right tributary of the river Turcu in Romania. Its source is in the Bucegi Mountains. It flows into the Turcu in Bran. Its length is 15km (09miles) and its basin size is 38km2.