| Official Name: | Monorierdő |
| Pushpin Map: | Hungary |
| Pushpin Map Caption: | Location of Monorierdő |
| Coordinates: | 47.3085°N 19.5°W |
| Subdivision Type: | Country |
| Subdivision Name: | Hungary |
| Subdivision Type1: | Region |
| Subdivision Name1: | Pest}} |
| Subdivision Type2: | County |
| Subdivision Type3: | District |
| Subdivision Name3: | Monor |
| Area Total Km2: | 15.11 |
| Population Density Km2: | auto |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 2213 |
| Area Code Type: | Area code |
| Area Code: | (+36) 29 |
Monorierdő is a village in Pest County, Hungary.
The village was a site of the Monorierdő train collision in 2008.