List of longest-serving G8 leaders Chronology of longest serving G8 Leaders Chronology of longest serving G8 Leaders

| Entered_office_as_Head_of_State_or_Government | Began_time_as_senior_G8_leader | Ended_time_as_senior_G8_leader | Person | Office |
|---|---|---|---|---|
| 16 October 1964 | 15 November 1975 | 5 April 1976 | Harold Wilson | Prime Minister of the United Kingdom |
| 16 May 1974 | 5 April 1976 | 27 June 1976 | Helmut Schmidt | Chancellor of West Germany |
| 20 April 1968 | 27 June 1976 | 4 June 1979 | Pierre Trudeau | Prime Minister of Canada |
| 16 May 1974 | 4 June 1979 | 1 October 1982 | Helmut Schmidt | Chancellor of West Germany |
| 4 May 1979 | 1 October 1982 | 28 November 1990 | Margaret Thatcher | Prime Minister of the United Kingdom |
| 10 May 1981 | 28 November 1990 | 17 May 1995 | François Mitterrand | President of France |