| 1898 | West Herts and Watford St Mary's merged |
| 1899-00 | Southern League Division Two Champions |
|
| Promoted after Test Match (Watford 2 Sheppey United 1) |
| 1900-01 | Retained status after drawing Test Match (Watford 0 Grays Utd 0) |
| 1902-03 | Relegated after Test Match (Brighton & Hove Albion 5 Watford 3, |
|
| at West Ham, 27.4.1903) |
| 1903-04 | Southern League Division Two Champions |
|
| Promoted to Divison One |
| 1914-15 | Southern League Champions |
| 1919-20 | Southern League runner-up, lost title on goal average |
| 1920-21 | Founder member of Division Three South |
| 1939-40 | Football League programme abandoned due to outbreak of war |
| 1958-59 | Placed in Division Four on League reorganisation |
| 1959-60 | Promoted to Division Three |
| 1968-69 | Football League Division Three Champions (on goal average) |
|
| Promoted to Division Two |
| 1969-70 | F.A. Cup semi-finalists |
| 1972 | Relegated to Division Three |
| 1975 | Relegated to Division Four |
| 1977-78 | Football League Division Four Champions |
|
| Promoted to Division Three |
| 1978-79 | Football League Division Three runner-up (on goal difference) |
|
| Promoted to Division Two |
|
| Football League Cup semi-finalists |
| 1981-82 | Football League Division Two runner-up |
|
| Promoted to Division One |
| 1982-83 | Football League runner-up |
| 1983-84 | F.A. Cup runner-up |
| 1986-87 | F.A. Cup semi-finalists |
| 1987 | Relegated to Division Two |
| 1988-89 | Not promoted after play-offs (SF Blackburn Rovers 0 Watford 0, |
|
| Watford 1 Blackburn Rovers 1 - Agg 1-1, lost on away goals) |
| 1992-93 | Division Two re-designated Division One on formation of F.A. |
|
| Premiership |
| 1996 | Relegated to Division Two |
| 1997-98 | Football League Division Two Champions |
|
| Promoted to Division One |
| 1998-99 | Promoted to F.A. Premiership after play-offs (SF Watford 1 |
|
| Birmingham City 0, Birmingham City 1 Watford 0, Watford won 7-6 |
|
| on penalties, F Watford 2 Bolton Wanderers 0 @ Wembley) |
| 2000 | Relegated to Football League Division One |
| 2002-03 | F.A. Cup Semi-Finalists |
| 2004-05 | Division One renamed "Football League Championship" |
|
| Football League Cup semi-finalists |
| 2005-06 | Promoted to F.A. Premiership after play-offs (SF Crystal Palace 0 |
|
| Watford 3, Watford 0 Crystal Palace 0, F Leeds United 0 Watford 3 @ |
|
| Millennium Stadium, Cardiff) |
