Cantonul Marciac este un canton din arondismentul Mirande, departamentul Gers, regiunea Midi-Pyrénées, Franța.
Comune
| Armentieux || align="right" | 76 || align="right" | 32230 || align="right" | 32008 |- | Beccas || align="right" | 83 || align="right" | 32730 || align="right" | 32039 |- | Blousson-Sérian || align="right" | 50 || align="right" | 32230 || align="right" | 32058 |- | Cazaux-Villecomtal || align="right" | 83 || align="right" | 32230 || align="right" | 32099 |- | Juillac || align="right" | 121 || align="right" | 32230 || align="right" | 32164 |- | Ladevèze-Rivière || align="right" | 223 || align="right" | 32230 || align="right" | 32174 |- | Ladevèze-Ville || align="right" | 249 || align="right" | 32230 || align="right" | 32175 |- | Laveraët || align="right" | 104 || align="right" | 32230 || align="right" | 32205 |- | Marciac || align="right" | 1 160 || align="right" | 32230 || align="right" | 32233 |- | Monlezun || align="right" | 189 || align="right" | 32230 || align="right" | 32273 |- | Monpardiac || align="right" | 33 || align="right" | 32170 || align="right" | 32275 |- | Pallanne || align="right" | 66 || align="right" | 32230 || align="right" | 32303 |- | Ricourt || align="right" | 66 || align="right" | 32230 || align="right" | 32342 |- | Saint-Justin || align="right" | 139 || align="right" | 32230 || align="right" | 32383 |- | Scieurac-et-Flourès || align="right" | 50 || align="right" | 32230 || align="right" | 32422 |- | Sembouès || align="right" | 56 || align="right" | 32230 || align="right" | 32427 |- | Tillac || align="right" | 295 || align="right" | 32170 || align="right" | 32446 |- | Tourdun || align="right" | 105 || align="right" | 32230 || align="right" | 32450 |- | Troncens || align="right" | 199 || align="right" | 32230 || align="right" | 32455
Categorie:Cantoane în Gers