| Country: | HUN |
| Type: | MR |
| Route: | 31 |
| Length Km: | 126 |
| Length Round: | 1 |
| Terminus A: | Budapest |
| Junction: |
|
| Terminus B: | in Dormánd |
| Counties: | Pest, Jász-Nagykun-Szolnok, Heves |
| Cities: | Budapest, Maglód, Gyömrő, Sülysáp, Nagykáta, Jászberény, Jászapáti, Heves |
The Main road 31 is a west–east direction Secondary class main road in the Danube–Tisza Interfluve (Alföld) region of Hungary that connects Budapest to the Main road 33 main roads, facilitating access from the capital city of Hungary to Füzesabony. The road is 126 km long.[1]
The road, as well as all other main roads in Hungary, is managed and maintained by Magyar Közút, state owned company.