The following Watford club members have particularly distinguished themselves on a national stage:
 
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:
 
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 League Championship.
2005 -
2007
AC Watford won the East Anglian League Championship for three consecutive years.
2001 AC Watford were club champions in the national Longman Cup