FA Cup 1987/88, Preliminary Round |
 | | | Llanelli | – | Barnstaple Town | | 1:2 |
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FA Cup 1986/87, First Qualifying Round |
| | | Sharpness | – | Llanelli | | 4:1 |
| |
FA Cup 1985/86, Preliminary Round |
| | | Llanelli | – | Minehead | | 2:3 |
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FA Cup 1984/85, First Qualifying Round |
| | | Llanelli | – | Gloucester City | | 2:5 |
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FA Cup 1983/84, First Qualifying Round |
| | | Basingstoke Town | – | Llanelli | | 2:1 |
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FA Cup 1982/83, First Qualifying Round |
| | | Gloucester City | – | Llanelli | | 1:0 |
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FA Cup 1981/82, First Qualifying Round |
| | | Llanelli | – | Haverfordwest County | | 1:2 |
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FA Cup 1980/81, Second Qualifying Round |
| | | Llanelli | – | Worcester City | | 0:3 |
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FA Cup 1979/80, Preliminary Round |
| | | Weston-Super-Mare | – | Llanelli | | 2:0 |
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FA Cup 1978/79, First Qualifying Round |
| | | Llanelli | – | Shepton Mallet Town | | 1:3 |
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FA Cup 1977/78, First Qualifying Round |
| | | Worcester City | – | Llanelli | | 2:0 * |
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FA Cup 1976/77, Third Qualifying Round |
| | | Llanelli | – | Merthyr Tydfil | | 3:6 |
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FA Cup 1975/76, Preliminary Round |
| | | Llanelli | – | Mangotsfield United | | 0:2 |
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FA Cup 1974/75, First Qualifying Round |
| | | Cheltenham Town | – | Llanelli | | 3:2 |
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FA Cup 1973/74, Second Qualifying Round |
| | | Llanelli | – | Mangotsfield United | | 1:2 |
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FA Cup 1972/73, First Qualifying Round |
| | | Llanelli | – | Barry Town | | 0:1 |
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FA Cup 1971/72, Preliminary Round |
| | | Llanelli | – | Merthyr Tydfil | | 0:3 |
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FA Cup 1970/71, Second Qualifying Round |
| | | Llanelli | – | Merthyr Tydfil | | 0:2 * |
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FA Cup 1969/70, First Qualifying Round |
| | | Llanelli | – | Stonehouse | | 1:2 |
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FA Cup 1968/69, Second Qualifying Round |
| | | Cinderford Town | – | Llanelli | | 3:0 |
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FA Cup 1967/68, Second Qualifying Round |
| | | Barry Town | – | Llanelli | | 4:0 * |
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FA Cup 1966/67, First Qualifying Round |
| | | Cinderford Town | – | Llanelli | | 2:0 |
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FA Cup 1965/66, First Qualifying Round |
| | | Gloucester City | – | Llanelli | | 1:0 |
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FA Cup 1964/65, Third Qualifying Round |
| | | Llanelli | – | Merthyr Tydfil | | 2:7 |
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FA Cup 1963/64, Fourth Qualifying Round |
| | | Llanelli | – | Bridgwater Town | | 0:1 * |
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FA Cup 1962/63, First Qualifying Round |
| | | Cheltenham Town | – | Llanelli | | 1:0 |
| |
FA Cup 1961/62, First Qualifying Round |
| | | Merthyr Tydfil | – | Llanelli | | 5:0 |
| |
FA Cup 1960/61, Third Qualifying Round |
| | | Cheltenham Town | – | Llanelli | | 2:0 |
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FA Cup 1959/60, Second Qualifying Round |
| | | Barry Town | – | Llanelli | | 2:0 |
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FA Cup 1958/59, First Qualifying Round |
| | | Lovells Athletic | – | Llanelli | | 3:2 * |
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FA Cup 1957/58, Third Qualifying Round |
| | | Barry Town | – | Llanelli | | 1:0 * |
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FA Cup 1956/57, Third Qualifying Round |
| | | Cheltenham Town | – | Llanelli | | 4:0 |
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FA Cup 1955/56, Second Qualifying Round |
| | | Llanelli | – | Lovells Athletic | | 0:3 |
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FA Cup 1954/55, First Qualifying Round |
| | | Llanelli | – | Merthyr Tydfil | | 1:2 |
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FA Cup 1953/54, First Round Proper |
| 21.11.1953 | | Northampton Town | – | Llanelli | | 3:0 |
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FA Cup 1952/53, Second Round Proper |
| 06.12.1952 | | Colchester United | – | Llanelli | | 3:2 |
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FA Cup 1951/52, Second Qualifying Round |
| | | Barry Town | – | Llanelli | | 4:0 * |
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FA Cup 1950/51, First Round Proper |
| 04.12.1950 | | Bristol Rovers | – | Llanelli | | 3:1 * |
| Cardiff |
FA Cup 1949/50, First Qualifying Round |
| | | Llanelli | – | Merthyr Tydfil | | 0:3 |
| |
FA Cup 1948/49, Second Qualifying Round |
| | | Barry Town | – | Llanelli | | 3:1 |
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FA Cup 1947/48, First Qualifying Round |
| | | Ebbw Vale | – | Llanelli | | 3:2 |
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FA Cup 1946/47, First Qualifying Round |
| | | Merthyr Tydfil | – | Llanelli | | 5:2 |
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FA Cup 1945/46, Third Qualifying Round |
| | | Llanelli | – | Barry Town | | 1:7 |
| |
FA Cup 1945/46, First Qualifying Round |
| | | Aberaman & Aberdare | – | Llanelli | | 6:1 * |
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FA Cup 1923/24, First Round Proper |
| 12.01.1924 | | Fulham | – | Llanelli | | 2:0 |
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