FA Cup 1975/76, Second Qualifying Round |
 | | | Letchworth Town | – | Cambridge City | | 0:1 |
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FA Cup 1974/75, Second Qualifying Round |
| | | St Albans City | – | Letchworth Town | | 1:0 |
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FA Cup 1973/74, First Qualifying Round |
| | | Biggleswade Town | – | Letchworth Town | | 2:0 |
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FA Cup 1972/73, First Qualifying Round |
| | | Letchworth Town | – | Egham Town | | 1:2 |
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FA Cup 1971/72, First Qualifying Round |
| | | Letchworth Town | – | Romford | | 1:2 |
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FA Cup 1970/71, First Qualifying Round |
| | | Bedford Town | – | Letchworth Town | | 3:0 |
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FA Cup 1969/70, First Qualifying Round |
| | | Letchworth Town | – | Irthlingborough Diamonds | | 2:3 |
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FA Cup 1968/69, First Qualifying Round |
| | | Letchworth Town | – | Banbury United | | 2:3 |
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FA Cup 1967/68, First Qualifying Round |
| | | Marlow | – | Letchworth Town | | 3:1 |
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FA Cup 1966/67, First Qualifying Round |
| | | Cambridge City | – | Letchworth Town | | 5:3 |
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FA Cup 1965/66, First Qualifying Round |
| | | Hitchin Town | – | Letchworth Town | | 4:1 |
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FA Cup 1964/65, First Qualifying Round |
| | | St Albans City | – | Letchworth Town | | 3:2 |
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FA Cup 1963/64, Second Qualifying Round |
| | | Letchworth Town | – | Hitchin Town | | 1:2 |
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FA Cup 1962/63, First Qualifying Round |
| | | Letchworth Town | – | Biggleswade Town | | 0:3 * |
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FA Cup 1961/62, First Qualifying Round |
| | | Bedford Town | – | Letchworth Town | | 8:0 |
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FA Cup 1960/61, First Qualifying Round |
| | | Letchworth Town | – | Stevenage Town | | 2:6 * |
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FA Cup 1959/60, Fourth Qualifying Round |
| | | Letchworth Town | – | King's Lynn | | 3:4 |
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FA Cup 1958/59, First Qualifying Round |
| | | Stevenage Town | – | Letchworth Town | | 3:2 |
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FA Cup 1957/58, Second Qualifying Round |
| | | Ware | – | Letchworth Town | | 3:0 |
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FA Cup 1956/57, First Qualifying Round |
| | | Hertford Town | – | Letchworth Town | | 3:0 * |
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FA Cup 1955/56, Preliminary Round |
| | | Enfield | – | Letchworth Town | | 3:1 |
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FA Cup 1954/55, Preliminary Round |
| | | Shefford Town | – | Letchworth Town | | 1:0 |
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FA Cup 1953/54, First Qualifying Round |
| | | Letchworth Town | – | Hitchin Town | | 0:1 * |
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FA Cup 1952/53, First Qualifying Round |
| | | Letchworth Town | – | Eton Manor | | 0:3 * |
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FA Cup 1951/52, Preliminary Round |
| | | Letchworth Town | – | Clapton | | 0:2 |
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FA Cup 1950/51, Preliminary Round |
| | | Biggleswade Town | – | Letchworth Town | | 3:2 * |
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FA Cup 1949/50, First Qualifying Round |
| | | St Neots & District | – | Letchworth Town | | 3:1 |
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FA Cup 1948/49, First Qualifying Round |
| | | Letchworth Town | – | Biggleswade Town | | 0:4 * |
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FA Cup 1947/48, First Qualifying Round |
| | | Letchworth Town | – | Vauxhall Motors Luton | | 1:5 * |
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FA Cup 1946/47, First Qualifying Round |
| | | Letchworth Town | – | Hitchin Town | | 0:2 |
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FA Cup 1945/46, Third Qualifying Round |
| | | Bedford Avenue | – | Letchworth Town | | 1:0 |
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