Cathal O'Connor (disambiguation)

Cathal O'Conor was king of Connacht from 1280 to 1288.

Cathal O'Connor or Cathal O'Conor may also refer to:

Kings of Connacht

 * Cathal mac Conchobar mac Taidg, king of Connacht, died 1010
 * Cathal Carragh Ua Conchobair, king of Connacht from 1189 to 1202
 * Cathal Crobhdearg Ua Conchobair, 12th/13th-century king of Connacht

Other

 * Cathal Ó Conchobair, 14th-century Irish bishop
 * Cathal O'Connor Faly, 16th-century Irish rebel, known as Don Carlos