FA Cup 1986/87, Preliminary Round |
 | | | Maesteg Park Athletic | – | Llanelli | | 2:3 |
| |
FA Cup 1983/84, Preliminary Round |
| | | Llanelli | – | Clevedon Town | | 3:0 |
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FA Cup 1981/82, Preliminary Round |
| | | Cinderford Town | – | Llanelli | | 1:2 |
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FA Cup 1980/81, First Qualifying Round |
| | | Llanelli | – | Clandown | | 2:0 |
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FA Cup 1976/77, Second Qualifying Round |
| | | Llanelli | – | Cinderford Town | | 3:2 |
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FA Cup 1976/77, First Qualifying Round |
| | | Llanelli | – | Calne Town | | 2:1 |
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FA Cup 1976/77, Preliminary Round |
| | | Everwarm | – | Llanelli | | 0:1 |
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FA Cup 1973/74, First Qualifying Round |
| | | Llanelli | – | Weston-Super-Mare | | 1:0 |
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FA Cup 1970/71, First Qualifying Round |
| | | Llanelli | – | Barry Town | | 1:0 |
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FA Cup 1968/69, First Qualifying Round |
| | | Llanelli | – | Ton Pentre | | 2:1 |
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FA Cup 1967/68, First Qualifying Round |
| | | Abergavenny Thursdays | – | Llanelli | | 0:2 |
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FA Cup 1964/65, Second Qualifying Round |
| | | Gloucester City | – | Llanelli | | 0:1 |
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FA Cup 1964/65, First Qualifying Round |
| | | Llanelli | – | Lovells Athletic | | 2:1 * |
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FA Cup 1963/64, Third Qualifying Round |
| | | Cheltenham Town | – | Llanelli | | 0:1 |
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FA Cup 1963/64, Second Qualifying Round |
| | | Barry Town | – | Llanelli | | 0:1 |
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FA Cup 1963/64, First Qualifying Round |
| | | Llanelli | – | Stonehouse | | 1:0 * |
| |
FA Cup 1960/61, Second Qualifying Round |
| | | Barry Town | – | Llanelli | | 1:2 * |
| |
FA Cup 1960/61, First Qualifying Round |
| | | Lovells Athletic | – | Llanelli | | 2:3 |
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FA Cup 1959/60, First Qualifying Round |
| | | Stonehouse | – | Llanelli | | 0:5 |
| |
FA Cup 1957/58, Second Qualifying Round |
| | | Llanelli | – | Lovells Athletic | | 4:2 |
| |
FA Cup 1957/58, First Qualifying Round |
| | | Llanelli | – | Ebbw Vale | | 3:2 * |
| |
FA Cup 1956/57, Second Qualifying Round |
| | | Llanelli | – | Cinderford Town | | 3:0 |
| |
FA Cup 1956/57, First Qualifying Round |
| | | Llanelli | – | Merthyr Tydfil | | 5:1 |
| |
FA Cup 1955/56, First Qualifying Round |
| | | Llanelli | – | Cinderford Town | | 5:0 |
| |
FA Cup 1953/54, Fourth Qualifying Round |
| | | Llanelli | – | Portland United | | 6:5 |
| |
FA Cup 1952/53, First Round Proper |
| 22.11.1952 | | Grays Athletic | – | Llanelli | | 0:5 |
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FA Cup 1952/53, Fourth Qualifying Round |
| | | Llanelli | – | Ilfracombe Town | | 1:0 |
| |
FA Cup 1952/53, Third Qualifying Round |
| | | Llanelli | – | Barry Town | | 3:0 * |
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FA Cup 1952/53, Second Qualifying Round |
| | | Ebbw Vale | – | Llanelli | | 0:3 |
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FA Cup 1952/53, First Qualifying Round |
| | | Lovells Athletic | – | Llanelli | | 0:1 |
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FA Cup 1952/53, Preliminary Round |
| | | Llanelli | – | Gloucester City | | 5:0 * |
| |
FA Cup 1951/52, First Qualifying Round |
| | | Llanelli | – | Lovells Athletic | | 2:0 |
| |
FA Cup 1950/51, Fourth Qualifying Round |
| | | Llanelli | – | Weymouth | | 5:0 |
| |
FA Cup 1950/51, Third Qualifying Round |
| | | Barry Town | – | Llanelli | | 1:2 * |
| |
FA Cup 1950/51, Second Qualifying Round |
| | | Merthyr Tydfil | – | Llanelli | | 1:2 * |
| |
FA Cup 1950/51, First Qualifying Round |
| | | Llanelli | – | Clevedon | | 7:1 * |
| |
FA Cup 1950/51, Preliminary Round |
| | | Llanelli | – | Ebbw Vale | | 2:0 |
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FA Cup 1949/50, Preliminary Round |
| | | Llanelli | – | Stonehouse | | 4:1 |
| |
FA Cup 1949/50, Extra Preliminary Round |
| | | Llanelli | – | Hoffmann Athletic Stonehouse | | 6:1 |
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FA Cup 1948/49, First Qualifying Round |
| | | Cardiff Corinthians | – | Llanelli | | 0:2 * |
| |
FA Cup 1947/48, Preliminary Round |
| | | Llanelli | – | Cardiff Corinthians | | 3:0 |
| |
FA Cup 1946/47, Preliminary Round |
| | | Llanelli | – | Ebbw Vale | | 5:2 * |
| |
FA Cup 1945/46, Second Qualifying Round |
| | | Llanelli | – | Monmouth Town | | 7:0 |
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