| Prif Borthladdoedd yn y byd |
| Ewrop | Corea |
| Porthladd Busan |
| Gwlad Belg | Porthladd Inchon |
| Porthladd Antwerp | Porthladd Mokpo |
| Porthladd Zeebrugge | |
| Porthladd Ghent | Japan |
| Porthladd Kobe |
| Croatia | Porthladd Yokohama |
| Porthladdoedd Croatia | Porthladd Kisarazu |
| Porthladd Sakata |
| Denmarc | Porthladd Nagoya |
| Porthladd Aalborg | Porthladd Kawasaki |
| Porthladd Aarhus | Porthladd Kitakyushu |
| Porthladd Aabenraa | Porthladd Chiba |
| |
| Ffindir | Kuwait |
| Porthladd ShangHai | Awdurdod Cyhoeddus Porthladdoedd Kuwait |
| Porthladdoedd y Ffindir | |
| Porthladd Helsinki | Malaysia |
| Porthladd Kemi | Awdurdod Porthladd Bintulu |
| Porthladd Kokkola | Awdurdod Porthladd Kuantan |
| Porthladd Kotka | Awdurdod Porthladd Malacca |
| Porthladd Oulu | Awdurdod Porthladd Johore |
| Porthladd Pori | Awdurdod Porthladd Kuching |
| Porthladd Pietsarsaari | |
| Porthladd Raahe | Emiradau Arabaidd Unedig |
| Porthladd Tornio | Porthladd Dubai |
| Porthladd Hamina | |
| India |
| Ffrainc | Porthladd Calcutta |
| Porthladd Bordeaux | Porthladd Mumbai |
| Porthladd Brest | Porthladd Jawaharlal |
| Porthladd Le Havre | |
| Pilipinas |
| Almaen | Manila |
| Porthladd Hamburg | |
| Indonesia |
| Gibraltar | Porthladd Tanjung Priok |
| Porthladd Gibraltar | |
| Israel |
| Groeg | Awdurdod Porthladdoedd a Rheilffyrdd Israel |
| Porthladd Thessaloniki | |
| Pacistan |
| Gwlad yr Iâ | Porthladd Karachi |
| Porthladd Reykjavik | |
| Singapoore |
| Eidal | Awdurdod Porthladd Singapôr |
| Porthladd Genefa | |
| Porthladd La Spezia | Gogledd America |
| Porthladd Napoli | |
| Porthladd Ravenna | Canada |
| Porthladd Salerno | Corfforaeth Porthladd Halifax |
| Porthladd Savona | Porthladd Montreal |
| Porthladd Augusta | Porthladd Toronto |
| Port Alberti |
| Latfia | Porthladd Belledune |
| Porthladdoedd Latfia | Porthladd Dalhousie |
| Porthladd Québec |
| Iseldiroedd | Porthladd Hamilton |
| Porthladd Rotterdam | Corfforaeth Porthladd Sant Ioan |
| Porthladd Sydney-Canada |
| Norwy | Porthladd Glan y Bae |
| Porthladd Oslo | Porthladd Churchill |
| Porthladd Sola | Corfforaeth Porthladd Prince Rupet |
| |
| Gwlad Pwyl | Mecsico |
| Porthladd Gdansk | Puerto de Veracruz |
| Porthladd Swinoujscie | Porthladd Mazatlan |
| |
| Portiwgal | Unol Daleithiau |
| Porthladd Setúbal | Porthladd Anacortes |
| Porthladd Sines | Porthladd Bellingham, Wa. |
| Porthladd Corpus Christi |
| Rwmania | Harbwr Porthladd Grays |
| Porthladd Constantza | Porthladd Whitman |
| Porthladd Los Angeles |
| Rwsia | Awdurdod Porthladd New Hampshire |
| Porthladd Novorossiysk | Porthladd Willmington |
| Awdurdod Porthladd St Petersburg | Porthladd Stockton |
| Porthladd Ust-Luga | Porthladd Port Arthur |
| Porthladd Vladivostok | Awdurdod Porthladd Sant Paul |
| Porthladd Seattle |
| Sbaen | Porthladd Philadelphia a Camden |
| Porthladd Barcelona | Comisiwn Porthladd Indiana |
| Porthladd Cartagena | Awdurdod Porthladdoedd Talaith Gogledd Carolina |
| Porthladd Santander | Porthladd Baltimore |
| Porthladd Bilbao | Porthladd Charleston |
| Porthladd La Coruña | Porthladd Kalama |
| Porthladd Tarragona | Autoridad Portuaria de Houston |
| Porthladd Vilagarcia de Arosa | Porthladd Jacksonville |
| Porthladd Cadiz | Porthladd Symudol |
| Porthladd Las Palmas | Porthladd Tacoma |
| Porthladd Valencia | Porthladd Oakland |
| Porthladd Malaga | Awdurdod Porthladd St. Louis |
| Porthladdoedd Almeria a Motril | Porthladd Portland |
| Porthladd Ceuta | Porthladd San Diego |
| Awdurdod Porthladd Efrog Newydd a New Jersey |
| Sweden | Comisiwn Porthladd Pittsburg |
| Porthladdoedd Sweden | Awdurdod Porthladd Afon Delaware |
| Porthladd Falkenberg | |
| Porthladd Goteborg | De America |
| Porthladd Halmstad | |
| Porthladd Harnsosand | Ariannin |
| Porthladd Helsingborg | Porthladdoedd yr Ariannin |
| Porthladd Malmoe | Comodoro Rivadavia |
| Porthladd Norrkopings | Porthladd Bahia Blanca |
| Porthladd Sodertalje | Mar del Plata Port |
| Port de Wallhamn | |
| Panama |
| Deyrnas Unedig | Awdurdod Porthladd Cenedlaethol Panama |
| Porthladdoedd Prydeinig Cysylltiedig | |
| Ayr a Troon | Brasil |
| Barrow | Porthladd Itajai |
| Barri | Porthladd Rio Grande |
| Caerdydd | Porthladd Santos |
| Colchester | Porthladd Ponta da Madeira |
| Fleetwood | Porthladd Salvador |
| Garston | Porthladd Vitoria |
| Goole | |
| Grimsby | Barbados |
| Hull | Porthladd Barbados |
| Immingham | |
| King’s Lynn | Colombia |
| Lowestoft | Porthladd Buenaventura |
| Casnewydd | Terfynell Môr El Bosque |
| Awdurdod Porthladd Llundain | Porthladd Barranquilla |
| Plymouth | |
| Silloth | El Salvador |
| Southampton | Porthladd Acajutla |
| Abertawe | Porthladd Cutuco |
| Talbot | |
| Teignmouth | Periw |
| Whitby | Menter Porthladd Cenedlaethol Periw |
| Porthladd Belfast | |
| Chile |
| Affrica | Porthladd Valparaiso |
| Porthladd Arica |
| Angola | Porthladdoedd Chile |
| Porthladd Luanda | |
| |
| De Affrica | |
| Porthladd Durban | |
| Porthladd Saldanha | |
| Porthladd Port Elizabeth | |
| Porthladd Dwyrain Llundain | |
| Porthladd Bae Richards | |
| Porthladd Capetown | |
| Porthladd Bae Mossel | |
| |
| Asia | |
| |
| Tsieina | |
| Porthladd ShangHai | |
| Porthladd NingBo | |
| Porthladd QingDao | |
| Porthladd kaohsiung | |
| Porthladd Keelung | |
| Porthladd Lianyungang | |
| Porthladd Dalian | |
| Porthladd Hong Kong | |
| Porthladd Hualien | |
| Porthladd Taichung | |