| Season | 1999–2000 |
|---|---|
| Champions | Oswestry Town |
| Relegated | Corwen Amateurs |
| ← 1998–99 2000–01 → | |
The 1999–2000 Cymru Alliance was the tenth season of the Cymru Alliance after its establishment in 1990. The league was won by Oswestry Town.
League table
| Pos | Team | Pld | W | D | L | GF | GA | GD | Pts | Promotion or relegation |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Oswestry Town (C, P) | 32 | 21 | 4 | 7 | 64 | 43 | +21 | 67 | Promotion to League of Wales |
| 2 | Glantraeth | 32 | 18 | 7 | 7 | 82 | 39 | +43 | 61 | |
| 3 | Cemaes Bay | 32 | 17 | 8 | 7 | 74 | 44 | +30 | 59 | |
| 4 | Welshpool Town | 32 | 17 | 6 | 9 | 60 | 41 | +19 | 57 | |
| 5 | CPD Porthmadog | 32 | 17 | 5 | 10 | 64 | 40 | +24 | 56 | |
| 6 | Flint Town United | 32 | 16 | 8 | 8 | 65 | 43 | +22 | 56 | |
| 7 | Llandudno | 32 | 16 | 5 | 11 | 70 | 57 | +13 | 53 | |
| 8 | Rhydymwyn | 32 | 15 | 5 | 12 | 55 | 54 | +1 | 50 | |
| 9 | Llangefni Town | 32 | 13 | 10 | 9 | 60 | 43 | +17 | 49 | |
| 10 | Buckley Town | 32 | 13 | 8 | 11 | 53 | 44 | +9 | 47 | |
| 11 | Ruthin Town | 32 | 13 | 7 | 12 | 55 | 45 | +10 | 46 | |
| 12 | Holyhead Hotspur | 32 | 9 | 6 | 17 | 52 | 70 | −18 | 33 | |
| 13 | Lex XI | 32 | 9 | 3 | 20 | 55 | 90 | −35 | 30 | |
| 14 | Brymbo | 32 | 7 | 8 | 17 | 32 | 51 | −19 | 29 | |
| 15 | Denbigh Town | 32 | 8 | 5 | 19 | 36 | 79 | −43 | 26 | |
| 16 | Holywell Town | 32 | 7 | 4 | 21 | 41 | 69 | −28 | 25 | |
| 17 | Corwen Amateurs (R) | 32 | 5 | 3 | 24 | 25 | 91 | −66 | 18 | Relegation to WNL Premier Division |
Rules for classification: 1) points; 2) goal difference; 3) number of goals scored.
(C) Champions; (P) Promoted; (R) Relegated
Notes:
- Denbigh Town deducted 3 points