Counties 1 Hertfordshire
| Current season or competition: 2025–26 Counties 1 Hertfordshire | |
| Sport | Rugby union |
|---|---|
| Instituted | 1987 (as London 3 North West) |
| Number of teams | 10 |
| Country | England |
| Holders | Brunel University (2024–25) |
| Most titles | Hertford, Tabard (3 titles) |
| Website | englandrugby.com |
Counties 1 Hertfordshire (formerly Counties 1 Herts/Middlesex and before that London 2 North West) is a tier 7 English Rugby Union league. It is organised by the London and South East Division Rugby Football Union and is the top-tier competition for clubs primarily in Hertfordshire together with others from parts of north-west London (that traditionally was encompassed by the historic county of Middlesex) and Essex. It was previously known as London 2 North West. After the restructuring of the English rugby union system ahead of the 2022–23 season, the league was renamed to Counties 1 Herts/Middlesex. Ahead of the 2025–26 season a decision was taken to split Hertfordshire RFU and Middlesex RFU clubs, with Middlesex teams moving on a level transfer to Counties 1 Middlesex while club 2XVs were introduced to the league. Brunel University are the current champions.
Each year the two Hertfordshire clubs in this division with the best record against other Hertfordshire clubs also take part in the Hertfordshire Presidents' Cup, the highest level county cup competition in Hertfordshire. Promoted teams typically go up to Regional 2 Thames while relegated teams drop to Counties 2 Hertfordshire.