| Mimram | |
|---|---|
 The river near Tewin | |
 | |
| Location | |
| Country | England |
| Physical characteristics | |
| Source | |
| • location | Nr. Whitwell |
| • elevation | 90 m (300 ft) |
| Mouth | |
• location | Hertford, Hertfordshire into River Lea |
• coordinates | 51°47′35.4″N 0°5′16.5″W / 51.793167°N 0.087917°W |
| Length | 20 km (12 mi) |
The River Mimram is a chalk stream in Hertfordshire, England. It runs from its source near Whitwell in Hertfordshire to join the River Lea at Hertford.