| Country: | IRN |
| Type: | road |
| Route: | 31 |
| Terminus A: | Sarband (Parsabad), Ardabil |
| Terminus B: | Khalkhal, Ardabil |
| Length Km: | 327 |
| Provinces: | Ardabil |
| Cities: | Ardabil, Ardabil Khalkhal, Ardabil Aqkand, East Azerbaijan |
| Junction: | |
| Map: | Road 31-Map-IR.png |
Road 31 is a road in north-west Iran in Ardabil Province. It connects Parsabad in north of province to Khalkhal. There is a project to extend the road through Alborz Mountain Range to Manjil in Gilan Province, expected to be done on 2020.[1] [2]