Men's team
| European Cup Winners' Cup | |
|---|---|
| Winners | 1965 |
| Runners-up | 1976 |
| UEFA Europa Conference League | |
|---|---|
| Winners | 2023 |
| FA Cup | |
|---|---|
| Winners | 1964, 1975, 1980 |
| Runners-up | 1923, 2006 |
| Football League (Second Tier) | |
|---|---|
| Winners | 1957/58, 1980/81 |
| Runners-up | 1922/23, 1990/91, 1992/93 |
| Football League (Second Tier) Play-Off | |
|---|---|
| Winners | 2005, 2012 |
| Runners-up | 2004 |
| UEFA Intertoto Cup | |
|---|---|
| Winners | 1999 |
| Football League War Cup | |
|---|---|
| Winners | 1940 |
| Football League Cup | |
|---|---|
| Runners-up | 1966, 1981 |
| FA Charity Shield | |
|---|---|
| Winners | 1964 (Shared) |
| Runners-up | 1975, 1980 |
| London League Premier Division | |
|---|---|
| Winners | 1901/02 |
| London League Division One (as Thames Ironworks) | |
|---|---|
| Winners | 1897/98 |
| Runners-up | 1896/97 |
| Southern League Second Division (as Thames Ironworks) | |
|---|---|
| Winners | 1898/99 |
| London FA Challenge Cup | |
|---|---|
| Winners | 1925, 1926, 1930, 1947, 1949, 1953, 1957, 1968, 1969 |
| Runners-up | 1933, 1955, 1958, 1959 |
| Essex Professional Cup | |
|---|---|
| Winners | 1951, 1955 (Shared), 1959 |
| Runners-up | 1952, 1958 |
| Southern Floodlight Cup | |
|---|---|
| Winners | 1956 |
| Runners-up | 1960 |
| Anglo-Italian Cup | |
|---|---|
| Runners-up | 1975 |
Academy of Football
| FA Youth Cup | |
|---|---|
| Winners | 1963, 1981, 1999, 2023 |
| Runners-up | 1957, 1959, 1975, 1996 |
| U19 FA Premier Academy League | |
|---|---|
| Winners | 1998/99, 1999/00 |
| U18 Premier League South | |
|---|---|
| Winners | 2022/23 |
| Premier League 2 Regular Season | |
|---|---|
| Runners-up | 2023/24 |
| Premier League 2 Division 1 | |
|---|---|
| Runners-up | 2021/22 |
| Premier League 2 Division 2 | |
|---|---|
| Winners | 2019/20 |
| Premier League 2 Division 2 Promotion Play-Off | |
|---|---|
| Winners | 2017 |
| Barclays U21 Premier League Group 1 | |
|---|---|
| Winners | 2012/13 |
| South East Counties League (Youth) | |
|---|---|
| Winners | 1984/85, 1995/96, 1997/98 |
| Runners-up | 1981/82, 1982/83 |
| South East Counties League Division 1 Cup (Youth) | |
|---|---|
| Winners | 1967, 1969 |
| Runners-up | 1994 |
| South East Counties League Division 2 Cup (Youth) | |
|---|---|
| Runners-up | 1973 |
| Metropolitan League Cup (West Ham United 'A') | |
|---|---|
| Winners | 1957/58 |
| Metropolitan League Professional Cup (West Ham United 'A') | |
|---|---|
| Winners | 1960, 1967, 1969 |
| Runners-up | 1971 |
| London League Premier Division (Reserves) | |
|---|---|
| Winners | 1908/09, 1911/12 (Section A), 1912/13 (Section A), 1914/15 (Professional) |
| Runners-up | 1907/08, 1909/10, 1913/14 (Professional) |
| The Football Combination (Reserves) | |
|---|---|
| Winners | 1916/17, 1920/21, 1923/24, 1924/25, 1947/48, 1953/54, 1977/78, 1985/86 |
| The Football Combination Cup (Reserves) | |
|---|---|
| Winners | 1954 |
Women's team
| South East Combination Women's Football League | |
|---|---|
| Winners | 2004/05 |
| Greater London League Premier Division | |
|---|---|
| Winners | 2000/01, 2001/02 |
| Greater London League Premier Division Promotion Play-Off | |
|---|---|
| Winners | 2002 |
| Women's FA Cup | |
|---|---|
| Runners-up | 2019 |
| FA Women's Premier League Plate | ||
|---|---|---|
| Winners | 2018 | |
| Isthmian League Women's Cup | |
|---|---|
| Winners | 2018 |
| Essex FA County Cup | |
|---|---|
| Winners | 2009, 2011, 2014 |
| London FA Capital Women's Cup | |
|---|---|
| Runners-up | 2015 |