Internationals who have played for Cross Keys at some time during their career.
| Name | Between Years | Team |
|---|---|---|
| Seremaia Baikeinuku | 2000 - 2016 | Fiji |
| Taine Basham | 2021 - 2022 | Wales |
| Ryan Bevington | 2011 - 2014 | Wales |
| George Boots | 1898 - 1904 | Wales |
| Lonza Bowdler | 1927 - 1933 | Wales |
| Ken Braddock | 1966 - 1967 | Wales |
| Archie Brown | 1921 - 1921 | Wales |
| Leon Brown | 2017 - 2023 | Wales |
| Lloyd Burns | 2011 - 2011 | Wales |
| Kristopher Burton | 2007 - 2013 | Italy |
| Glyn Davies | 1955 - 1955 | Wales |
| Elliot Dee | 2017 - 2021 | Wales |
| Gareth Evans | 1977 - 1978 | Wales |
| Taulupe Faletau | 2011 - 2023 | Wales |
| Tony Faulkner | 1975 - 1979 | Wales |
| Jason Forster | 2004 - 2004 | Wales |
| Andrew Gibbs | 1995 - 1997 | Wales |
| Oliver Griffiths | 2017 - 2017 | Wales |
| Andrew Hall | 2002 - 2002 | Scotland |
| Jack Hancock | 1955 - 1955 | England |
| George Hathway | 1924 - 1924 | Wales |
| Ron Herrera | 1925 - 1927 | Wales |
| Jack Hurrell | 1959 - 1959 | Wales |
| Glyn John | 1954 - 1954 | Wales |
| Adam Jones | 2006 - 2006 | Wales |
| Glyn Jones | 1930 - 1933 | Wales |
| Kingsley Jones | 1996 - 1998 | Wales |
| Matt Jones | 2005 - 2005 | Wales |
| Walter Legge | 1937 - 1938 | Wales |
| Arthur Lewis | 1970 - 1973 | Wales |
| Ossie Male | 1921 - 1928 | Wales |
| Scott Morgan | 2007 - 2007 | Wales |
| Tyler Morgan | 2015 - 2018 | Wales |
| Steve Morris | 1920 - 1925 | Wales |
| Con Murphy | 1935 - 1935 | Wales |
| Rhys Oakley | 2003 - 2003 | Wales |
| Movete Ota'ota | 2000 - 2005 | Tonga |
| Sam Parry | 2020 - 2021 | Wales |
| Harry Phillips | 1927 - 1928 | Wales |
| Brian Price | 1961 - 1969 | Wales |
| Cecil Pritchard | 1928 - 1929 | Wales |
| Richie Rees | 2010 - 2010 | Wales |
| Tom Rees | 1935 - 1937 | Wales |
| Fred Reeves | 1920 - 1921 | Wales |
| Rex Richards | 1956 - 1956 | Wales |
| Jamie Ringer | 2001 - 2001 | Wales |
| Matthew Screech | 2021 - 2021 | Wales |
| Jeff Squire | 1977 - 1983 | Wales |
| Russell Taylor | 1937 - 1939 | Wales |
| Nahuel Tetaz Chaparro | 2012 - 2022 | Argentina |
| Alan Thomas | 1963 - 1964 | Wales |
| Justin Thomas | 1995 - 1997 | Wales |
| Joe Thompson | 1923 - 1923 | Wales |
| Dick Uzzell | 1963 - 1965 | Wales |
| Bill Ward | 1934 - 1934 | Wales |
| Stuart Watkins | 1964 - 1970 | Wales |
| Billy Williams | 1927 - 1927 | Wales |
| John Williams | 1920 - 1921 | Wales |
| Tabber Williams | 1935 - 1937 | Wales |
| Bobby Windsor | 1973 - 1979 | Wales |
| Stan Winmill | 1921 - 1921 | Wales |