| Welsh Amateur Cup | |
| Year: | 1898-99 |
| Country: | Wales |
| Defending Champions: | Rhos Eagle Wanderers |
| Winners: | Oswestry United Reserves |
| Second: | Singleton & Coles |
| Prev Season: | 1897–98 |
| Next Season: | 1899–1900 |
The 1898–99 Welsh Amateur Cup was the ninth season of the Welsh Amateur Cup. The cup was won by Oswestry United Reserves who defeated Shrewsbury based team Singleton & Coles 1–0 in the final, at Welshpool.
| Home team | Result | Away team | Remarks | |
|---|---|---|---|---|
| Wrexham Reserve | 4-0[1] | Caergwrle Wanderers Reserve | ||
| Minera St Marys | Stansty Villa |
| Home team | Result | Away team | Remarks | |
|---|---|---|---|---|
| Rhyl United Reserve | 6-1[3] | St. Asaph Athletic | ||
| Llandudno Swifts Reserves | 2-1[4] | Flint Reserve | ||
| Bangor Reserve | 3-1[5] | Colwyn Bay | ||
| Flint Athletic | Bye | |||
| Adwy United | Rossett | |||
| Stansty Villa | Brymbo Junior | |||
| Buckley Victoria Reserves | Wrexham Reserve | |||
| Bwlchgwyn Albion | Erddig Albion | |||
| Whitchurch Alexandra | 3-0[6] | Rhos Eagle Wanderers Reserves | ||
| Oswestry United Reserve | 11-0[7] | Derwen Rangers | ||
| Chirk Reserve | Druids Reserve | |||
| Ellesmere Rangers | 6-0 | Llangollen Wanderers | ||
| Shrewsbury Barracks Rovers | 0-4[8] | Dolgelly | ||
| Snailbeach | Aberystwyth Reserves | |||
| Llanfyllin | 3-2 | Newtown Reserve | ||
| Singleton and Coles | 9-0[9] | Welshpool United |
| Home team | Result | Away team | Remarks | |
|---|---|---|---|---|
| Rhyl United Reserve | Llandudno Swifts Reserves | |||
| Bangor Reserve | 4-1 | Flint Athletic | ||
| Stansty Villa | 5-0 | Erddig Albion | ||
| Wrexham Reserve | 2-1 | Adwy United | ||
| Druids Reserve | 4-0 | Ellesmere Rangers | ||
| Whitchurch Alex | 1-3 | Oswestry United Reserve | ||
| Singleton and Coles | 4-0 | Dolgelly | ||
| Llanfyllin | Aberystwyth Reserves |
| Home team | Result | Away team | Remarks | |
|---|---|---|---|---|
| Llandudno Swifts Reserves | 3-0[13] | Bangor Reserve | ||
| Stansty Villa | Wrexham Reserve | |||
| Druids Reserve | 1-3[14] | Oswestry United Reserve | ||
| Llanfyllin | 1-6 | Singleton and Coles |
| Result | Venue | |||
|---|---|---|---|---|
| Oswestry United Reserve | 4-3[15] | Wrexham Reserve | Wynnstay Park, Ruabon | |
| Singleton and Coles | 4-1[16] | Llandudno Swifts Reserves | The Racecourse, Wrexham |