| Martonca Martonka-patak | |
|---|---|
  Location within Romania | |
| Location | |
| Country | Romania |
| Counties | Harghita County |
| Villages | Făgețel, Martonca |
| Physical characteristics | |
| Source | Gurghiu Mountains |
| Mouth | Mureș |
• coordinates | 46°50′55″N 25°26′55″E / 46.8487°N 25.4486°E |
| Length | 14 km (8.7 mi) |
Basin size | 24 km2 (9.3 sq mi) |
| Basin features | |
| Progression | Mureș→ Tisza→ Danube→ Black Sea |
| Tributaries | |
| • right | Lucaci |
The Martonca (Hungarian: Martonka-patak, from the name "Martin") is a left tributary of the river Mureș in Transylvania, Romania. It discharges into the Mureș near Subcetate. Its length is 14 km (8.7 mi) and its basin size is 24 km2 (9.3 sq mi).
