FA Cup 2023/24, Extra Preliminary Round |
 | 05.08.2023 | | Harefield United | – | Farnham Town | | 0:4 (0:3) |
| London |
FA Cup 2022/23, Preliminary Round |
| 20.08.2022 | | Midhurst & Easebourne | – | Harefield United | | 2:1 |
| Midhurst |
FA Cup 2022/23, Extra Preliminary Round |
| 06.08.2022 | | Harefield United | – | Lordswood | | 3:2 (2:0) |
| London |
FA Cup 2021/22, First Qualifying Round |
| 04.09.2021 | | Harefield United | – | Hastings United | | 0:4 (0:3) |
| London |
FA Cup 2021/22, Preliminary Round |
| 21.08.2021 | | Harefield United | – | Binfield | | 2:1 (0:0) |
| London |
FA Cup 2021/22, Extra Preliminary Round |
| 07.08.2021 | | Chipping Sodbury Town | – | Harefield United | | 1:2 (1:1) |
| Chipping Sodbury |
FA Cup 2020/21, Preliminary Round |
| 12.09.2020 | | Harefield United | – | Leighton Town | | 1:2 |
| London |
FA Cup 2020/21, Extra Preliminary Round |
| 01.09.2020 | | Tuffley Rovers | – | Harefield United | | 2:5 |
| Tuffley |
FA Cup 2019/20, Preliminary Round |
| 25.08.2019 | | Evesham United | – | Harefield United | | 2:1 (1:0) |
| Evesham |
FA Cup 2019/20, Extra Preliminary Round |
| 10.08.2019 | | Harefield United | – | Lydney Town | | 3:0 (0:0) |
| London |
FA Cup 2016/17, First Qualifying Round |
| 03.09.2016 | | AFC Kempston Rovers | – | Harefield United | | 3:2 |
| Kempston |
FA Cup 2016/17, Preliminary Round |
| 23.08.2016 | | Harefield United | – | Wembley | | 2:1 * |
| London |
FA Cup 2016/17, Preliminary Round |
| 20.08.2016 | | Wembley | – | Harefield United | | 1:1 |
| London |
FA Cup 2016/17, Extra Preliminary Round |
| 10.08.2016 | | Northampton ON Chenecks | – | Harefield United | | 1:1 aet
(1:1),
pen. 8:9 * |
| Cogenhoe |
FA Cup 2016/17, Extra Preliminary Round |
| 06.08.2016 | | Harefield United | – | Northampton ON Chenecks | | 1:1 |
| London |
FA Cup 2015/16, Extra Preliminary Round |
| 18.08.2015 | | Long Buckby | – | Harefield United | | 1:0 * |
| Long Buckby |
FA Cup 2015/16, Extra Preliminary Round |
| 15.08.2015 | | Harefield United | – | Long Buckby | | 2:2 |
| London |
FA Cup 2014/15, Preliminary Round |
| 30.08.2014 | | Harefield United | – | Leverstock Green | | 1:2 |
| London |
FA Cup 2014/15, Extra Preliminary Round |
| 16.08.2014 | | Harefield United | – | Crawley Green | | 2:1 |
| London |
FA Cup 2013/14, Preliminary Round |
| 31.08.2013 | | Berkhamsted | – | Harefield United | | 4:1 |
| Berkhamsted |
FA Cup 2013/14, Extra Preliminary Round |
| 17.08.2013 | | Harefield United | – | Woodford United | | 3:0 |
| London |
FA Cup 2012/13, Second Qualifying Round |
| 25.09.2012 | | Harefield United | – | South Park | | 1:4 (1:1) * |
| London |
FA Cup 2012/13, Second Qualifying Round |
| 22.09.2012 | | South Park | – | Harefield United | | 0:0 |
| Reigate |
FA Cup 2012/13, First Qualifying Round |
| 08.09.2012 | | Colney Heath | – | Harefield United | | 1:2 |
| Colney Heath |
FA Cup 2012/13, Preliminary Round |
| 25.08.2012 | | London Colney | – | Harefield United | | 1:2 |
| London Colney |
FA Cup 2012/13, Extra Preliminary Round |
| 11.08.2012 | | Harefield United | – | Hillingdon Borough | | 3:0 |
| |
FA Cup 2011/12, Preliminary Round |
| 06.09.2011 | | Harefield United | – | Staines Lammas | | 0:2 * |
| |
FA Cup 2011/12, Preliminary Round |
| 03.09.2011 | | Staines Lammas | – | Harefield United | | 2:2 |
| |
FA Cup 2011/12, Extra Preliminary Round |
| 20.08.2011 | | Holmer Green | – | Harefield United | | 2:4 |
| |
FA Cup 2010/11, Preliminary Round |
| 28.08.2010 | | Crawley Green | – | Harefield United | | 2:0 |
| |
FA Cup 2010/11, Extra Preliminary Round |
| 14.08.2010 | | Leverstock Green | – | Harefield United | | 1:2 |
| |
FA Cup 2009/10, Second Qualifying Round |
| 26.09.2009 | | Harefield United | – | Maidstone United | | 0:2 |
| |
FA Cup 2009/10, First Qualifying Round |
| 12.09.2009 | | Harefield United | – | Maldon Town | | 3:1 |
| |
FA Cup 2009/10, Preliminary Round |
| 29.08.2009 | | Harefield United | – | Biggleswade Town | | 2:1 |
| |
FA Cup 2009/10, Extra Preliminary Round |
| 18.08.2009 | | Haringey Borough | – | Harefield United | | 1:3 * |
| |
FA Cup 2009/10, Extra Preliminary Round |
| 15.08.2009 | | Harefield United | – | Haringey Borough | | 1:1 |
| |
FA Cup 2008/09, Preliminary Round |
| 03.09.2008 | | Saffron Walden Town | – | Harefield United | | 2:0 * |
| |
FA Cup 2008/09, Preliminary Round |
| 30.08.2008 | | Harefield United | – | Saffron Walden Town | | 1:1 |
| |
FA Cup 2008/09, Extra Preliminary Round |
| 16.08.2008 | | Bowers & Pitsea | – | Harefield United | | 1:2 |
| |
FA Cup 2007/08, Extra Preliminary Round |
| 18.08.2007 | | Barking | – | Harefield United | | 4:0 |
| |
FA Cup 2006/07, Preliminary Round |
| 02.09.2006 | | Harefield United | – | Wivenhoe Town | | 1:4 |
| |
FA Cup 2006/07, Extra Preliminary Round |
| 22.08.2006 | | Harefield United | – | Halstead Town | | 3:1 * |
| |
FA Cup 2006/07, Extra Preliminary Round |
| 19.08.2006 | | Halstead Town | – | Harefield United | | 0:0 |
| |
FA Cup 2005/06, Extra Preliminary Round |
| 20.08.2005 | | Harefield United | – | Langford | | 2:3 |
| |
FA Cup 2004/05, Extra Preliminary Round |
| | | Norwich United | – | Harefield United | | 2:0 |
| |
FA Cup 2003/04, Extra Preliminary Round |
| | | Bedford United & Valerio | – | Harefield United | | 1:0 |
| |
FA Cup 2002/03, Second Qualifying Round |
| | | AFC Sudbury | – | Harefield United | | 5:0 * |
| |
FA Cup 2002/03, Second Qualifying Round |
| | | Harefield United | – | AFC Sudbury | | 4:4 |
| |
FA Cup 2002/03, First Qualifying Round |
| | | Harefield United | – | Barton Rovers | | 2:1 |
| |
FA Cup 2002/03, Preliminary Round |
| | | East Thurrock United | – | Harefield United | | 1:2 |
| |
FA Cup 1996/97, Preliminary Round |
| | | Harefield United | – | Halstead Town | | 2:4 |
| |
FA Cup 1995/96, Preliminary Round |
| | | Harefield United | – | Hoddesdon Town | | 0:1 |
| |
FA Cup 1994/95, First Qualifying Round |
| | | Harefield United | – | Hornchurch | | 0:3 |
| |
FA Cup 1994/95, Preliminary Round |
| | | Harefield United | – | Hoddesdon Town | | 1:0 * |
| |
FA Cup 1994/95, Preliminary Round |
| | | Hoddesdon Town | – | Harefield United | | 1:1 |
| |
FA Cup 1993/94, Preliminary Round |
| | | Hanwell Town | – | Harefield United | | 1:2 |
| |
FA Cup 1993/94, First Qualifying Round |
| | | Harefield United | – | Hornchurch | | 1:2 |
| |
FA Cup 1992/93, Preliminary Round |
| | | Harefield United | – | Barkingside | | 0:1 |
| |
FA Cup 1991/92, Preliminary Round |
| | | Dulwich Hamlet | – | Harefield United | | 2:1 |
| |
FA Cup 1990/91, Preliminary Round |
| | | Harefield United | – | Merstham | | 0:1 |
| |
FA Cup 1989/90, Preliminary Round |
| | | Boreham Wood | – | Harefield United | | 1:0 |
| |
FA Cup 1988/89, Preliminary Round |
| | | Burgess Hill Town | – | Harefield United | | 2:1 |
| |
FA Cup 1987/88, Second Qualifying Round |
| | | Harefield United | – | Bromley | | 2:3 |
| |
FA Cup 1987/88, First Qualifying Round |
| | | Harefield United | – | Crockenhill | | 3:1 |
| |
FA Cup 1986/87, Second Qualifying Round |
| | | Aylesbury United | – | Harefield United | | 2:0 * |
| |
FA Cup 1986/87, Second Qualifying Round |
| | | Harefield United | – | Aylesbury United | | 2:2 |
| |
FA Cup 1986/87, First Qualifying Round |
| | | Harefield United | – | Corinthian-Casuals | | 3:0 |
| |
FA Cup 1985/86, First Qualifying Round |
| | | Aveley | – | Harefield United | | 2:0 * |
| |
FA Cup 1985/86, First Qualifying Round |
| | | Harefield United | – | Aveley | | 0:0 |
| |
FA Cup 1985/86, Preliminary Round |
| | | Harefield United | – | Hertford Town | | 3:0 * |
| |
FA Cup 1985/86, Preliminary Round |
| | | Hertford Town | – | Harefield United | | 1:1 |
| |
FA Cup 1984/85, First Qualifying Round |
| | | Harefield United | – | Sutton United | | 0:2 |
| |
FA Cup 1983/84, Preliminary Round |
| | | Aylesbury United | – | Harefield United | | 2:0 |
| |
FA Cup 1982/83, Preliminary Round |
| | | Harefield United | – | Croydon | | 0:4 |
| |
FA Cup 1981/82, Preliminary Round |
| | | Irthlingborough Diamonds | – | Harefield United | | 2:1 |
| |
FA Cup 1980/81, Second Qualifying Round |
| | | Maidenhead United | – | Harefield United | | 5:1 * |
| |
FA Cup 1980/81, Second Qualifying Round |
| | | Harefield United | – | Maidenhead United | | 0:0 |
| |
FA Cup 1980/81, First Qualifying Round |
| | | Leyton-Wingate | – | Harefield United | | 0:3 |
| |
FA Cup 1979/80, Preliminary Round |
| | | Harefield United | – | Walton & Hersham | | 1:4 |
| |
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