Middlesex 1
| Sport | Rugby union |
|---|---|
| Instituted | 1987 |
| Ceased | 1996 |
| Number of teams | 13 |
| Country | England |
| Holders | Hackney (1st title) (1995–96) (promoted to Herts/Middlesex 1) |
Counties 1 Middlesex (formerly Middlesex 1) is a level 8 Rugby Union league with teams from North-West London taking part. Historically the league was a level 10 completion and the division was cancelled in at the end of the 1995–96 campaign after nine seasons due to the merger of the Hertfordshire and Middlesex regional leagues. After nearly 20yrs, ahead of the 2025-26 season the league was re-instated as decision was taken to once more split out Hertfordshire RFU and Middlesex RFU clubs.
Promoted teams typically move up to Regional 2 Thames and relegated sides move down to Counties 2 Middlesex.