| Herts/Middlesex 5 | |
| Sport: | Rugby union |
| Teams: | 15 |
| Champion: | Millfield Old Boys (north) (1st title) Northolt (south) (1st title) |
| Season: | 1996–97) (both promoted to Middlesex 4 |
| Most Champs: | Millfield Old Boys, Northolt |
| Count: | 1 |
Herts/Middlesex 5 was a tier 13 English Rugby Union league that was organized by the London and South East Division Rugby Football Union. It was the fifth division competition for clubs in Hertfordshire and parts of north-west London that traditionally belonged to the historic county of Middlesex. The league was split into two regional divisions - Herts/Middlesex 5 North and Herts/Middlesex 5 - with promoted teams moving up to Herts/Middlesex 4 and there was no relegation as it was the lowest level in the region. Herts/Middlesex 5 only lasted one season before being discontinued, with all teams being transferred into Herts/Middlesex 4.
When the division was created in 1996 it contained the following teams in two regional divisions:
Herts/Middlesex 5 North
Herts/Middlesex 5 South
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| Season | No of Teams | Champions | Runners–up | Relegated Teams | League Name | ||||||||||
| 1996–97[1] | 7 | Millfield Old Boys | No relegation | Herts/Middlesex 5 North | |||||||||||
| 8 | Northolt | No relegation | Herts/Middlesex 5 South | ||||||||||||
| Green backgrounds are promotion places. | |||||||||||||||