Viscounts | Titles by Rank
- Viscounts of Cabañas
- Viscounts of Cabo de Santa Maria
- Viscounts of Cabo de São Vicente
- Viscounts of Cabo Frio
- Viscounts of Cabo Frio-I
- Viscounts of Cabrela
- Viscounts of Cabrera
- Viscounts of Cachoeira
- Viscounts of Cacongo
- Viscounts of Cadars
- Viscounts of Caetano Pinto
- Viscounts of Caeté
- Viscounts of Caffarelli
- Viscounts of Cairu
- Viscounts of Calçada
- Viscounts of Caldas
- Viscounts of Calhariz de Benfica
- Viscounts of Calonne
- Viscounts of Calonne-Ricouart
- Viscounts of Camamu
- Viscounts of Camaragibe
- Viscounts of Camarate
- Viscounts of Campanhã
- Viscounts of Campo Alegre
- Viscounts of Cananeia
- Viscounts of Canas
- Viscounts of Canelas
- Viscounts of Canet
- Viscounts of Cantagalo
- Viscounts of Cantim
- Viscounts of Caparacena
- Viscounts of Capelinha
- Viscounts of Carandaí
- Viscounts of Carapebus
- Viscounts of Caravelas
- Viscounts of Caravelas-I
- Viscounts of Caravelas-II
- Viscounts of Carcassonne
- Viscounts of Carcavelos
- Viscounts of Cardona
- Viscounts of Cardoso da Silva
- Viscounts of Caria
- Viscounts of Carlat
- Viscounts of Carmenco
- Viscounts of Carnaxide
- Viscounts of Carnide
- Viscounts of Carregoso
- Viscounts of Carreira
- Viscounts of Carriche
- Viscounts of Cartaxo