The Count of Foix ruled the County of Foix, in what is now Southern France, during the Middle Ages. The House of Foix eventually extended its power across the Pyrenees mountain range, joining the House of Bearn and moving their court to Pau in Béarn. Count Francis Phoebus became King of Navarre in 1479. The last count was King Henry III of Navarre, after whose accession to the French throne the county entered the French royal domain.
To this day, the president of France is considered an unofficial successor of the count (as the current ruler of the French state) as co-prince of Andorra.
|width=auto| Roger I<br />1034–1064 | | ?<br />second son of Bernard-Roger and Garsenda, Countess of Bigorre | never married | c. 1064<br /> |- |width=auto| Pierre-Bernard<br />1064–1071 | | ?<br />third son of Bernard-Roger and Garsenda, Countess of Bigorre | Ledgarde<br />two son | c. 1071<br /> |- |width=auto| Roger II<br />1071–1124 | | ?<br />eldest son of Pierre-Bernard and Ledgarde | (1) Sicarda<br />1073<br />no issues<br /> (2) Stephanie of Besalú<br />four children | c. 1124<br /> |- |width=auto| Roger III<br />1124–1148 | | ?<br />eldest son of Roger II and Stephanie of Besalú | (1) ?<br />one daughter<br /> (2) Jimena of Barcelona<br />bef. 8 July 1130<br />two children | c. 1148<br /> |- |width=auto| Roger-Bernard I<br />1148–1188 | | c. 1130<br />only son of Roger III and Jimena of Barcelona | Cecilia of Béziers<br />11 July 1151<br />five children | November 1188<br />aged 57âÂÂ58 |- |width=auto| Raymond-Roger<br />1188–1223 | | c. 1152<br />second son of Roger-Bernard I and Cecilia of Béziers | Philippa of Montcada<br />1189<br />two children | 27 March 1223<br />Château de Mirepoix<br />aged 70âÂÂ71 |- |width=auto| Roger-Bernard II<br />1223–1241 | | c. 1195<br />only son of Raymond-Roger and Philippa of Montcada | (1) Ermesinda, Viscountess of Castelbón<br />10 January 1203<br />two children<br /> (2) Ermengarde of Narbonne<br />23 January 1232<br />one daughter | 26 May 1241<br />aged 45âÂÂ46 |- |width=auto| Roger IV<br />1241–1265 | | ?<br />only son of Roger-Bernard II and Ermesinda, Viscountess of Castelbón | Brunissenda of Cardona<br />17 February 1231<br />five children | 24 February 1265<br /> |- |width=auto| Roger-Bernard III<br />1265–1302 | | c. 1243<br />eldest son of Roger IV and Brunissenda of Cardona | Margaret, Viscountess of Béarn<br />14 October 1252<br />Tarn-et-Garonne<br />five children | 3 March 1302<br />aged 59 |-
|width=auto| Gaston I<br />1302–1315 | | c. 1287<br />only son of Roger-Bernard III and Margaret, Viscountess of Béarn | Joan of Artois<br />October 1301<br />Senlis<br />six children | 13 December 1315<br />Maubuisson Abbey, Pontoise<br />aged 27âÂÂ28 |- |width=auto| Gaston II<br />1315–1343 | | c. 1308<br />eldest son of Gaston I and Joan of Artois | Eleanor of Comminges<br />1327<br />one son | 26 September 1343<br />Seville<br />aged 34âÂÂ35 |- |width=auto| Gaston III Phoebus<br />1343–1391 | | 30 April 1331<br />Orthez<br />only son of Gaston II and Eleanor of Comminges | Agnes of Navarre<br />Paris<br />4 August 1349<br />one son | 1 August 1391<br />L'Hôpital-d'Orion<br />aged 60 |- |width=auto| Matthew<br />1391–1398 | | c. 1363<br />second son of Roger Bernard IV, Viscount of Castelbon and Gerauda of Navailles | Joanna of Aragon<br />4 June 1392<br />Barcelona<br />no issues | August 1398<br />aged 34âÂÂ35 |- |width=auto| Isabella<br />1398–1428<br /><small>with Archambaud (1398–1412)<br />with John I (1412–1428)</small> | | bef. 2 November 1361<br />only daughter of Roger Bernard IV, Viscount of Castelbon and Gerauda of Navailles | rowspan="2"| 1381<br />five children | c. 1428<br />aged 46+ |- |width=auto| Archambaud de Grailly<br />1398–1412<br /><small>with Isabella</small> | | c. 1329-1330<br />second son of Pierre II de Grailly and Erembourga de Périgord | c. 1412<br />aged 81âÂÂ83 |-
|width=auto| John I<br />1412–1436<br /><small>with Isabella (1412–1428)</small> | | c. 1382<br />eldest son of Archambaud and Isabella | (1) Joan of Navarre<br />12 November 1402<br />Royal Palace of Olite<br />no issues<br /> (2) Jeanne d'Albret<br />23 May 1422<br />two sons<br /> (3) Joanna of Urgell<br />May 1436<br />no issues | 4 May 1436<br />Mazères, Ariège<br />aged 53âÂÂ54 |- |width=auto| Gaston IV<br />1436–1472 | | 27 November 1422<br />eldest son of John I and Jeanne d'Albret | Eleanor of Navarre<br />30 July 1436<br />ten children | 25/28 July 1472<br />Roncevalles<br />aged 49 |- |width=auto| Francis Phoebus<br />1472–1483 | | November/December 1466<br />only son of Gaston of Foix, Prince of Viana and Magdalena of Valois | never married | 30 January 1483<br />Pamplona<br />aged 16 |- |width=auto| Catherine<br />1483–1517<br /><small>with John II (1484–1516)</small> | | 1468<br />only daughter of Gaston of Foix, Prince of Viana and Magdalena of Valois | rowspan="2"| 14 July 1484<br />Palacio Real de Olite<br />thirteen children | 12 February 1517<br />Mont-de-Marsan<br />aged 48âÂÂ49 |- |width=auto| John II<br />1484–1516<br /><small>with Catherine</small> | | 1469<br />second son of Alain I of Albret and Françoise, Countess of Périgord | 14 June 1516<br />Château de Pau<br />aged 46âÂÂ47 |-
|width=auto| Henry I<br>1517âÂÂ1555 | | 18 April 1503<br />Sangüesa<br>third son of John II and Catherine | Margaret of Angoulême<br />24 January 1527<br />Saint-Germain-en-Laye<br />two children | 25 May 1555<br />Hagetmau<br />aged 52 |- |width=auto| Jeanne<br />1555âÂÂ1572<br /><small>with Antoine (1555–1562)</small> | | 7 January 1528<br />Saint-Germain-en-Laye<br /> only daughter of Henry I and Margaret of Angoulême | (1) William, Duke of Jülich-Cleves-Berg<br />14 June 1541<br />Château de Châtellerault<br />no issues<br />(2) Antoine of Navarre<br />20 October 1548<br />Moulins en Bourbonnais, Allier<br />five children | 9 June 1572<br />Paris<br />aged 44 |- |width=auto| Antoine<br />1555-1562<br /><small>with Jeanne</small> | | 22 April 1518<br />La Fère, Picardy<br /> second son of Charles, Duke of Vendôme and Françoise of Alençon | Jeanne<br />20 October 1548<br />Moulins en Bourbonnais, Allier<br />five children | 17 November 1562<br />Les Andelys, Eure<br />aged 44 |-
|width=auto| Henry II<br />1572–1607 | | 13 December 1553<br />Château de Pau<br />second son of Antoine and Jeanne |(1) Margaret of Valois<br />18 August 1572<br />Notre Dame Cathedral, Paris<br />no issues<br />(2) Marie de' Medici<br />17 December 1600<br />Lyon<br />six children | 14 May 1610<br>Paris<br />aged 56 |-
In 1607 the county of Foix was reunited to the French crown.