FA Cup 2023/24, First Qualifying Round |
 | 02.09.2023 |  | Hitchin Town | – | Welwyn Garden City | | 2:1 (0:1) |
| Hitchin |
FA Cup 2022/23, Preliminary Round |
| 20.08.2022 | | Welwyn Garden City | – | Hertford Town | | 1:2 (1:0) |
| Welwyn Garden City |
FA Cup 2021/22, Third qualifying round |
| 02.10.2021 | | Bromsgrove Sporting | – | Welwyn Garden City | | 1:0 (0:0) |
| Bromsgrove |
FA Cup 2019/20, Preliminary Round |
| 24.08.2019 | | Wingate & Finchley | – | Welwyn Garden City | | 2:0 (0:0) |
| London |
FA Cup 2018/19, Preliminary Round |
| 25.08.2018 | | Brantham Athletic | – | Welwyn Garden City | | 1:0 (1:0) |
| Brantham |
FA Cup 2017/18, Extra Preliminary Round |
| 05.08.2017 | | Welwyn Garden City | – | North Greenford United | | 2:4 |
| Welwyn Garden City |
FA Cup 2016/17, Preliminary Round |
| 20.08.2016 | | Stotfold | – | Welwyn Garden City | | 3:2 |
| Stotfold |
FA Cup 2015/16, First Qualifying Round |
| 12.09.2015 | | Welwyn Garden City | – | St Ives Town | | 0:1 (0:0) |
| Welwyn Garden City |
FA Cup 2014/15, First Qualifying Round |
| 13.09.2014 | | Thurrock | – | Welwyn Garden City | | 2:0 |
| Aveley |
FA Cup 2010/11, Extra Preliminary Round |
| 14.08.2010 | | St Margaretsbury | – | Welwyn Garden City | | 2:1 |
| |
FA Cup 2009/10, Extra Preliminary Round |
| 14.08.2009 | | Flackwell Heath | – | Welwyn Garden City | | 4:0 |
| |
FA Cup 2008/09, Extra Preliminary Round |
| 16.08.2008 | | Stanway Rovers | – | Welwyn Garden City | | 4:0 |
| |
FA Cup 2007/08, First Qualifying Round |
| 15.09.2007 | | Welwyn Garden City | – | Billericay Town | | 2:8 |
| |
FA Cup 2006/07, Extra Preliminary Round |
| 19.08.2006 | | Haverhill Rovers | – | Welwyn Garden City | | 2:0 |
| |
FA Cup 2005/06, Third Qualifying Round |
| 08.10.2005 | | Histon | – | Welwyn Garden City | | 2:1 |
| |
FA Cup 2000/01, First Qualifying Round |
| | | Ford United | – | Welwyn Garden City | | 3:0 |
| |
FA Cup 1999/00, Preliminary Round |
| | | Stowmarket Town | – | Welwyn Garden City | | 3:0 |
| |
FA Cup 1998/99, Third Qualifying Round |
| | | Ford United | – | Welwyn Garden City | | 4:2 * |
| |
FA Cup 1997/98, Preliminary Round |
| | | Welwyn Garden City | – | East Thurrock United | | 2:3 |
| |
FA Cup 1996/97, First Qualifying Round |
| | | Welwyn Garden City | – | Aylesbury United | | 1:4 |
| |
FA Cup 1995/96, Preliminary Round |
| | | Welwyn Garden City | – | Brook House | | 0:2 * |
| |
FA Cup 1994/95, First Qualifying Round |
| | | Welwyn Garden City | – | Ware | | 1:2 |
| |
FA Cup 1992/93, Preliminary Round |
| | | Wembley | – | Welwyn Garden City | | 5:0 |
| |
FA Cup 1991/92, Preliminary Round |
| | | Witham Town | – | Welwyn Garden City | | 3:1 |
| |
FA Cup 1990/91, Preliminary Round |
| | | Welwyn Garden City | – | Chalfont St Peter | | 1:2 |
| |
FA Cup 1989/90, Preliminary Round |
| | | Halstead Town | – | Welwyn Garden City | | 4:2 * |
| |
FA Cup 1988/89, Preliminary Round |
| | | Potton United | – | Welwyn Garden City | | 2:0 |
| |
FA Cup 1955/56, Preliminary Round |
| | | Welwyn Garden City | – | Clapton | | 0:3 |
| |
FA Cup 1954/55, Preliminary Round |
| | | Stevenage Town | – | Welwyn Garden City | | 5:2 |
| |
FA Cup 1949/50, Preliminary Round |
| | | Welwyn Garden City | – | Edgware Town | | 0:2 |
| |
FA Cup 1948/49, Extra Preliminary Round |
| | | Welwyn Garden City | – | Hendon | | 0:3 |
| |
FA Cup 1947/48, Extra Preliminary Round |
| | | Welwyn Garden City | – | Enfield | | 1:5 |
| |
FA Cup 1946/47, Extra Preliminary Round |
| | | Berkhamsted Town | – | Welwyn Garden City | | 4:2 * |
| |
FA Cup 1945/46, Preliminary Round |
| | | Tufnell Park | – | Welwyn Garden City | | 11:1 |
| |
