The following Watford club members have particularly distinguished themselves on a national stage:
2019 GC Nick Archer reached the last 16 in the GC World Championships, knocking out the defending world champion Reg Bamford.
2019 AC Simon Hathrell won the AC National Seniors' Championship
2017 AC Simon Hathrell won the AC National Veterans' Championship
2016 GC Alan Clark played for Scotland in the GC World Team Championships
2015 AC Jonathan Lambton won the AC All England Handicap Championship
2015 GC Alan Clark won the GC All England Handicap Championship
2015 AC Simon Hathrell won the AC National Veterans' Championship
2015 GC Nick Archer won the Shield at the GC European Championships
2014 AC Simon Hathrell won the AC National Seniors' Championship
2011 GC Nick Archer won the GC All England Handicap Championship
2010 AC Geoff Johnson won the AC All England Handicap Championship
2009 Quiller Barrett was elected President of the Croquet Association of England
2009 GC Frances Skinner won the national Grass Roots GC Championship
2007 GC Nick Archer won the national Grass Roots GC Championship
2005 GC John Walker won the national Grass Roots GC Championship
   
On a team level:
2024 AC Herts, captained by Watford's Simon Hathrell,  won the national AC Inter-Counties Championship for the first time since 1908.
2021 GC Watford won the national GC Inter-Club (Murphy) Shield.
2021 GC Watford won the East Anglian GC Open League Championship.
2018 GC Watford won the national GC Inter-Club (Murphy) Shield.
2018 GC Watford won the GC 4-Club Trophy.
2017 GC Watford won the East Anglian GC Level Play League Championship.
2017 GC Watford won the national GC Inter-Club (Murphy) Shield.
2017 AC Watford won the East Anglian AC League Championship.
2017 AC Watford won the national Mary Rose competition for Level Advanced AC play, in only the 2nd year we have played in it.
2017 GC Herts, captained by Watford's Nick Archer, won the East Anglian GC inter-counties championship, the 'Ken Wheeler Shield', for the fourth time in seven years.
2015 GC Herts, captained by Watford's Nick Archer, won the East Anglian GC inter-counties championship, the 'Ken Wheeler Shield', for the third time in five years.
2013 GC Watford won the national GC Inter-Club (Murphy) Shield.
2007 -
2010		 AC Herts, captained by Watford's Mark Homan, won the East Anglian 'B'-Level counties championship, the 'Anderson Shield', for four consecutive years.
2007 GC Watford won the East Anglian GC League Championship.
2005 -
2007		 AC Watford won the East Anglian AC League Championship for three consecutive years.
2001 AC Watford were club champions in the national Longman Cup competition. for AC Handicap play.