FA Cup 2023/24, Second Qualifying Round |
 | 16.09.2023 | | Leiston | – | St Albans City | | 1:2 (0:0) |
| Leiston |
FA Cup 2022/23, First Qualifying Round |
| 03.09.2022 | | Needham Market | – | Leiston | | 3:1 (1:1) |
| Needham Market |
FA Cup 2021/22, Third qualifying round |
| 02.10.2021 | | Leiston | – | Tamworth | | 1:3 (0:1) |
| Leiston |
FA Cup 2020/21, Fourth Qualifying Round |
| 24.10.2020 | | Leiston | – | Barnet | | 2:3 |
| Leiston |
FA Cup 2019/20, First Qualifying Round |
| 07.09.2019 | | Ware | – | Leiston | | 5:1 (2:0) |
| Ware |
FA Cup 2018/19, Second Qualifying Round |
| 22.09.2018 | | Leiston | – | Hastings United | | 3:4 (2:2) |
| Leiston |
FA Cup 2017/18, Third Qualifying Round |
| 30.09.2017 | | Oxford City | – | Leiston | | 4:2 (1:1) |
| Marston |
FA Cup 2016/17, Fourth Qualifying Round |
| 15.10.2016 | | Westfields | – | Leiston | | 2:1 |
| Hereford |
FA Cup 2015/16, Third Qualifying Round |
| 10.10.2015 | | Leiston | – | Gloucester City | | 1:3 (0:1) |
| Leiston |
FA Cup 2014/15, Second Qualifying Round |
| 27.09.2014 | | Hendon | – | Leiston | | 4:1 |
| London Hendon cricket ground |
FA Cup 2013/14, First Qualifying Round |
| 14.09.2013 | | Billericay Town | – | Leiston | | 2:0 |
| Billericay |
FA Cup 2012/13, Second Qualifying Round |
| 22.09.2012 | | Badshot Lea | – | Leiston | | 4:2 |
| Godalming |
FA Cup 2011/12, First Qualifying Round |
| 17.09.2011 | | Leiston | – | AFC Sudbury | | 0:1 |
| |
FA Cup 2010/11, Fourth Qualifying Round |
| 26.10.2010 | | Dartford | – | Leiston | | 3:2 * |
| |
FA Cup 2009/10, Extra Preliminary Round |
| 15.08.2009 | | Dereham Town | – | Leiston | | 3:1 |
| |
FA Cup 2008/09, First Round Proper |
| 18.11.2008 | | Fleetwood Town | – | Leiston | | 2:0 (0:0) * |
| |
FA Cup 2007/08, Extra Preliminary Round |
| 18.08.2007 | | Mildenhall Town | – | Leiston | | 3:0 |
| |
FA Cup 2006/07, First Qualifying Round |
| 16.09.2006 | | Dunstable Town | – | Leiston | | 3:2 |
| |
FA Cup 2005/06, Extra Preliminary Round |
| 23.08.2005 | | Leiston | – | Brook House | | 1:3 * |
| |
FA Cup 2004/05, Preliminary Round |
| | | Leiston | – | Tilbury | | 0:2 |
| |
FA Cup 1958/59, First Qualifying Round |
| | | Leiston | – | Whitton United | | 2:6 |
| |
FA Cup 1957/58, First Qualifying Round |
| | | Bury Town | – | Leiston | | 8:1 |
| |
FA Cup 1956/57, First Qualifying Round |
| | | Lowestoft Town | – | Leiston | | 8:1 |
| |
FA Cup 1955/56, First Qualifying Round |
| | | Sudbury Town | – | Leiston | | 14:1 |
| |
FA Cup 1954/55, First Qualifying Round |
| | | Leiston | – | Sudbury Town | | 2:3 |
| |
FA Cup 1953/54, First Qualifying Round |
| | | Stowmarket | – | Leiston | | 2:0 |
| |
FA Cup 1952/53, First Qualifying Round |
| | | Bury Town | – | Leiston | | 9:1 |
| |
FA Cup 1951/52, First Qualifying Round |
| | | Whitton United | – | Leiston | | 4:1 |
| |
FA Cup 1950/51, First Qualifying Round |
| | | Leiston | – | Lowestoft Town | | 0:1 |
| |
FA Cup 1949/50, Preliminary Round |
| | | Leiston | – | Achilles | | 0:5 |
| |
FA Cup 1948/49, First Qualifying Round |
| | | Gothic | – | Leiston | | 5:2 |
| |
FA Cup 1947/48, Second Qualifying Round |
| | | Gothic | – | Leiston | | 3:1 |
| |
FA Cup 1946/47, Third Qualifying Round |
| | | Leiston | – | Gothic | | 0:2 * |
| |
FA Cup 1945/46, Fourth Qualifying Round |
| | | Chelmsford City | – | Leiston | | 9:0 |
| |
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