 | Ibis Guimaraes Hotel Porto and North of Portugal | 2.0 star rating | 140 | Guimaraes |
 | ibis Porto Centro Hotel Porto and North of Portugal | 4.0 star rating | 77 | Porto |
 | Ibis S. Joao - Porto Hotel Porto and North of Portugal | 2.0 star rating | 100 | Porto |
 | Impero - Three Bedroom Hotel Porto and North of Portugal | Without Official Category | | Mondim de Basto |
| Inatel Cerveira Hotel Porto and North of Portugal | 4.0 star rating | 100 | Vila Nova Cerveira |
 | INATEL Santa Maria da Feira Hotel Porto and North of Portugal | 3.0 star rating | 72 | Santa Maria da Feira |
 | Infante de Sagres - Small Luxury Hotels of the Wor Porto and North of Portugal | 5.0 star rating | 70 | Porto |
 | Inlima Hotel e Spa Porto and North of Portugal | 4.0 star rating | 30 | Porto |
 | Intercontinental Porto Palacio das Cardosas Hotel Porto and North of Portugal | 5.0 star rating | 105 | Porto |
 | Internacional Porto Hotel Porto and North of Portugal | 3.0 star rating | 35 | Porto |
 | iStay Hotel Porto Centro Porto and North of Portugal | 2.0 star rating | 56 | Porto |
| João XXI Hotel Porto and North of Portugal | 3.0 star rating | 40 | Braga |
 | Joao Paulo II Hotel Porto and North of Portugal | 3.0 star rating | 91 | Braga |
 | Lamego Hotel Porto and North of Portugal | 4.0 star rating | 93 | Lamego |
 | Lara Hotel Porto and North of Portugal | 3.0 star rating | 53 | Porto |
 | Laranjeira Hotel Porto and North of Portugal | 2.0 star rating | 26 | Viana do Castelo |
| Lindens House Hotel Porto and North of Portugal | Pending Category | 5 | Porto |
 | Lousada Country Hotel Porto and North of Portugal | 4.0 star rating | 30 | Penafiel |
 | Luna Arcos Hotel Nature & Welness Porto and North of Portugal | 4.0 star rating | 75 | Braga |
 | Luso Brasileiro Hotel Porto and North of Portugal | 2.0 star rating | 62 | Povoa do Varzim |
 | Malaposta Hotel Porto and North of Portugal | 3.0 star rating | 38 | Porto |
 | Maria da Fonte Hotel Porto and North of Portugal | Rural Hotel 3* | 31 | Povoa de Lanhoso |
 | Meira Hotel Porto and North of Portugal | 4.0 star rating | 52 | Vila Praia De Ancora |
 | Melia Braga Hotel Porto and North of Portugal | 5.0 star rating | 182 | Braga |
 | Mercure Braga Centro Hotel Porto and North of Portugal | 4.0 star rating | 132 | Braga |
 | Mercure Porto Centro Hotel Porto and North of Portugal | 4.0 star rating | 149 | Porto |
 | Mercure Porto Gaia Hotel Porto and North of Portugal | 4.0 star rating | 104 | Vila Nova de Gaia |
 | Minho Hotel Porto and North of Portugal | 4.0 star rating | 60 | Vila Nova Cerveira |
 | MiraCorgo Hotel Porto and North of Portugal | 4.0 star rating | 166 | Vila Real |
| Miradouro Hotel Porto and North of Portugal | 2.0 star rating | 30 | Porto |
| Moderna do Gerês Hotel Porto and North of Portugal | 2.0 star rating | 26 | Geres |
| Moinho De Estoraos Hotel Porto and North of Portugal | Rural House | 1 | Porto |
 | Moinhos Da Tia Antoninha Hotel Porto and North of Portugal | 3.0 star rating | 7 | Freixinho |
 | Montalegre Hotel Porto and North of Portugal | 4.0 star rating | 42 | Montalegre |
 | Monte Carlo Love Porto Hotel Porto and North of Portugal | 3.0 star rating | 6 | Porto |
 | Monte LÃrio Hotel & Wellness Centre Porto and North of Portugal | 4.0 star rating | 44 | Espinho |
 | Monte Prado & Spa Hotel Porto and North of Portugal | 4.0 star rating | 50 | Viana do Castelo |
 | Monverde â Wine Experience Hotel Porto and North of Portugal | 4.0 star rating | 29 | Amarante |
 | Morgadio da Calçada Hotel Porto and North of Portugal | Bed And Breakfast 4* | 8 | Sabrosa |
 | Moutados Hotel Porto and North of Portugal | 3.0 star rating | 56 | Braga |
 | Navarras by Tamega Clube Hotel Porto and North of Portugal | 3.0 star rating | 58 | Amarante |
| Nave Hotel Porto and North of Portugal | 3.0 star rating | | Porto |
 | Nh Collection Porto Batalha Hotel Porto and North of Portugal | 4.0 star rating | 107 | Porto |
 | Nova Cruz Hotel Porto and North of Portugal | 3.0 star rating | 65 | Porto |
 | Novotel Porto Gaia Hotel Porto and North of Portugal | 4.0 star rating | 93 | Vila Nova de Gaia |
 | Open Village Sports Hotel & SPA Club Porto and North of Portugal | 4.0 star rating | 51 | Guimaraes |
 | OpoHotel Porto Aeroporto Porto and North of Portugal | 4.0 star rating | 64 | Maia |
| Oporto City Center Apartments Hotel Porto and North of Portugal | 1 Star | 9 | Porto |
 | Oporto Excentric Design Hostel Hotel Porto and North of Portugal | 1 Star | 6 | Porto |
 | Orbitur Angeiras Hotel Porto and North of Portugal | 1st Camping | 4 | Matosinhos |