| Watford | | 2000 | | First Round | 29-10-2000 | | Rushden & Diamonds | Watford | 3-0 | | 2001 | | First Round | 28-10-2001 | | Watford | Barnet Copthall | 4-0 | | Second Round | 11-11-2001 | | Watford | Enfield | 1-2 | | 2002 | | First Round | 03-11-2002 | | Aylesbury United | Watford | 1-13 | | Second Round | 17-11-2002 | | Queens Park Rangers | Watford | 0-1 | | Third Round | 08-12-2002 | | Newquay | Watford | 1-4 | | Fourth Round | 19-01-2003 | | Watford | Liverpool | 1-1 | | Fifth Round | 26-01-2003 | | Lincoln City | Watford | 2-0 | |
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| 2003 | | Third Round | 07-12-2003 | | Watford | Brighton & Hove Albion | 1-2 | |
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| 2004 | | Third Round | 05-12-2004 | | Watford | Cardiff City | 5-2 | |
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| 2005 | | Third Round | 11-12-2005 | | Watford | Queens Park Rangers | 3-0 | | Fourth Round | 08-01-2006 | | AFC Wimbledon | Watford | 1-3 | | Fifth Round | 29-01-2006 | | Watford | Chelsea | 0-1 | |
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| 2006 | | Third Round | 10-12-2006 | | Watford | Barnet | 4-2 | | Fourth Round | 07-01-2007 | | Newcastle United | Watford | 0-4 | | Fifth Round | 28-01-2007 | | Liverpool | Watford | 3-0 | | 2007 | | Fourth Round | 06-01-2008 | | Manchester City | Watford | 1-4 | | Fifth Round | 27-01-2008 | | Watford | Newcastle United | 3-3 | |
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| 2008 | | Fourth Round | 18-01-2009 | | Watford | Bristol Academy | 1-3 | | 2009 | | Fourth Round | 24-01-2010 | | Leeds Carnegie | Watford | 4-1 | | 2010 | | Third Round | 06-02-2011 | | Andover New Street | Watford | 2-3 | | Fourth Round | 06-03-2011 | | Nottingham Forest | Watford | 3-3 | | Fifth Round | 13-03-2011 | | Millwall Lionesses | Watford | 5-0 | |
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| 2011 | | Third Round | 19-02-2012 | | Watford | Leeds United | 1-6 | | 2012 | | Third Round | 03-02-2013 | | Derby County | Watford | 0-4 | | Fourth Round | 24-02-2013 | | Watford | Leeds United | 0-2 | | 2013 | | Third Round | 23-02-2014 | | West Ham United | Watford | 1-5 | | Fourth Round | 16-03-2014 | | Sunderland AFC | Watford | 4-1 | | 2014 | | Third Round | 01-02-2015 | | Watford | Brighton & Hove Albion | 2-1 | | Fourth Round | 08-03-2015 | | Watford | Keynsham Town | 2-1 | | Fifth Round | 22-03-2015 | | Chelsea | Watford | 6-0 | | 2015 | | Third Round | 07-02-2016 | | Watford | Millwall Lionesses | 1-3 | |
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| 2016 | | Third Round | 05-02-2017 | | Doncaster Rovers Belles | Watford | W/O | |
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| 2017 | | Fourth Round | 04-02-2018 | | Liverpool | Watford | 5-0 | | 2018 | | Second Round | 09-12-2018 | | Watford | Buckland Athletic | 1-0 | | Third Round | 06-01-2019 | | Middlesbrough | Watford | 2-7 | | Fourth Round | 02-02-2019 | | Manchester City | Watford | 3-0 | | 2019 | | Second Round | 01-12-2019 | | Keynsham Town | Watford | 0-3 | | Third Round | 05-01-2020 | | Watford | Plymouth Argyle | 5-0 | | Fourth Round | 26-01-2020 | | Sunderland AFC | Watford | 2-0 | | 2020 | | Second Round | 04-04-2021 | | Watford | Milton Keynes Dons | 3-1 | | Third Round | 11-04-2021 | | Watford | Wolverhampton Wanderers | 1-4 | | 2021 | | Third Round | 12-12-2021 | | Watford | Coventry United | 0-4 | | 2022 | | First Round | 13-11-2022 | | Watford | Fulham | 7-1 | | Second Round | 27-11-2022 | | Watford | Crawley Wasps | P-P | | Second Round | 04-12-2022 | | Watford | Crawley Wasps | 6-0 | | Third Round | 11-12-2022 | | Crystal Palace | Watford | P-P | | Third Round | 08-01-2023 | | Crystal Palace | Watford | 5-1 | | 2023 | | Third Round | 10-12-2023 | | Southampton | Watford | 1-6 | | Fourth Round | 14-01-2024 | | Arsenal | Watford | 5-1 | | 2024 | | First Round | 03-11-2024 | | AFC Wimbledon | Watford | 0-0 | | Second Round | 24-11-2024 | | Oxford United | Watford | 1-0 | |
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