| Tenure | Incumbent | Affiliation | Notes |
| Republic of Chad (République du Tchad) |
| 11 August 1960 to 23 April 1962 | François Tombalbaye, Head of State | PPT | |
| 23 April 1962 to 30 August 1973 | François Tombalbaye, President | Changed name to N’Garta Tombalbaye |
| 30 August 1973 to 13 April 1975 | N’Garta Tombalbaye, President | MNRCS | (contd.); Previously named François Tombalbaye;
Died in office |
| 13 April 1975 to 15 April 1975 | Noël Milarew Odingar, interim Head of State | Mil | |
| 15 April 1975 to 12 May 1975 | Félix Malloum N'Gakoutou, Chairman of the Higher Military Council | Mil | |
| 12 May 1975 to 29 August 1978 | Félix Malloum N'Gakoutou, Head of State | |
| 29 August 1978 to 23 March 1979 | Félix Malloum N'Gakoutou, President | |
| 23 March 1979 to 29 April 1979 | Goukouni Oueddei, Chairman of the Provisional Council of State | FROLIANT-FAP | 1st Term |
| 29 April 1979 to 3 September 1979 | Lol Mohamed Shawa, President of Transitional Government of National Union | MPLT | |
| 3 September 1979 to 10 November 1979 | Goukouni Oueddei, Chairman of the Provisional Administrative Committee | FROLIANT-FAP | 2nd Term |
| 10 November 1979 to 7 June 1982 | Goukouni Oueddei, President of Transitional Government of National Union |
| 7 June 1982 to 19 June 1982 | Hissène Habré, Chairman of the Command Council of the Armed Forces of the North | FAN | |
| 19 June 1982 to 21 October 1982 | Hissène Habré, Chairman of the Council of State | |
| 21 October 1982 to 1984 | Hissène Habré, President | |
| 1984 to 1 December 1990 | UNIR | (contd.) |
| 1984 to 2 December 1990 | Jean Alingue Bawoyeu, acting President | UDR | |
| 2 December 1990 to 4 December 1990 | Lieutenant-General Idriss Déby, President of the Patriotic Salvation Movement | MPS | |
| 4 December 1990 to 4 March 1991 | Lieutenant-General Idriss Déby, Head of State | |
| 4 March 1991 to present | Lieutenant-General Idriss Déby, President | |
| Nassour Guelendouksia Ouaido, acting President | MPS | For Déby |
| |
| ACTUS | Action Tchadienne pour l’Unité et le Socialisme | (Chadian Union for Unity and Socialism) |
| ANDR | Alliance Nationale pour la Démocratie et le Renouveau | (National Union for Democracy and Renewal) |
| MPS | Mouvement Patriotique du Salut | (Patriotic Salvation Movement) |
| MPLT | Mouvement des Personnes pour la Libération du le Chad | (People’s Movement for the Liberation of the Chad) |
| UDR | Union pour la Démocratie et la République | (Union for Democracy and Republic) |
| UNIR | Union Nationale pour l’Indépendance et Révolution | (National Union for Independence and Revolution) until 1984: FAN |
| ANLC | Avant National de Libération du Chad | (Front for the National Liberation of the Chad) |
| FAN | Forces Armées du Nord | (Armed Forces of the North) from 1984: UNIR |
| FAP | Forces Armées des Personnes | (People’s Armed Forces) |
| FROLIANT | Front de Libération Nationale du Tchad | (National Liberation Front of Chad) pro-Libyan, to 1987 |
| GIRT | Groupement des Indépendants et Paysans Tchadian | (Rally for Chadian Self-employed and Peasants) split from Union Démocratique Tchadienne |
| MNRCS | Mouvement National pour la Révolution Culturelle et Sociale | (National Movement for the Cultural and Social Revolution) only legal party Jun 1973-13 Apr 1975, from PPT |
| PPT | Parti Progressiste Tchadien | (Chadian Progressive Party) leftist, only legal party Jan 1962-Jun 1973, from 1973: MNRCS |
| RUDT | Rassemlement pour l’Unité et la Démocratie au Tchad | (Rally for Unity and Democracy in Chad) |
| Mil | Military |
| n-p | non-partisan |
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