Maritime transport CO2 emissions (experimental) by country
This experimental dataset includes annual, quarterly, and monthly information on carbon dioxide (CO2) emissions from maritime transport based on ship-tracking information collected via Automatic Identification System (AIS) transponders, covering all large vessels (above 300 gross tonnage) around the world, accessed...
What the numbers show
Maritime transport CO2 emissions (experimental) is currently reported for 155 countries. The highest value is 54.81 million Tonnes in OECD; the lowest is 2.47 Tonnes in Guernsey.
The median across all reporting countries is 100,974 Tonnes, and the mean is 1.07 million Tonnes.
Over the past decade 99 countries rose and 55 fell. The largest increase was in Anguilla (up 1,260.9%), and the largest decrease in Hong Kong (down 91.2%).
Maritime transport CO2 emissions (experimental): full country ranking
| # | Country | Latest | Year | 10-year change | Trend |
|---|---|---|---|---|---|
| 1 | OECD | 54.81 million Tonnes | 2025 | down 5.2% | rising |
| 2 | China | 24.22 million Tonnes | 2025 | up 20.0% | rising |
| 2 | Türkiye | 3.13 million Tonnes | 2025 | up 54.0% | rising |
| 2 | Mauritania | 116,150 Tonnes | 2025 | up 101.3% | rising |
| 3 | United States | 9.33 million Tonnes | 2025 | up 3.3% | rising |
| 3 | Netherlands | 2.52 million Tonnes | 2025 | up 21.9% | rising |
| 3 | Croatia | 103,936 Tonnes | 2025 | up 20.9% | rising |
| 4 | Brazil | 6.01 million Tonnes | 2025 | up 20.5% | rising |
| 4 | Viet Nam | 1.07 million Tonnes | 2025 | up 244.3% | rising |
| 4 | Fiji | 97,678 Tonnes | 2025 | down 7.6% | rising |
| 5 | Spain | 4.45 million Tonnes | 2025 | up 13.2% | rising |
| 5 | Poland | 232,237 Tonnes | 2025 | up 85.0% | rising |
| 5 | Cabo Verde | 80,380 Tonnes | 2025 | up 71.5% | rising |
| 6 | Australia | 4.34 million Tonnes | 2025 | down 6.3% | rising |
| 6 | Equatorial Guinea | 76,064 Tonnes | 2024 | up 15.1% | rising |
| 6 | Lithuania | 52,090 Tonnes | 2025 | up 25.0% | rising |
| 7 | Russia | 3.58 million Tonnes | 2025 | up 206.2% | rising |
| 7 | Madagascar | 57,376 Tonnes | 2025 | up 66.7% | rising |
| 7 | Estonia | 44,654 Tonnes | 2025 | down 15.5% | falling |
| 8 | India | 3.36 million Tonnes | 2025 | up 23.0% | rising |
| 8 | Latvia | 35,773 Tonnes | 2025 | up 12.7% | volatile |
| 8 | Anguilla | 2,114 Tonnes | 2025 | up 1,260.9% | volatile |
| 9 | Malaysia | 3.26 million Tonnes | 2025 | up 19.6% | rising |
| 9 | Micronesia | 24,582 Tonnes | 2025 | down 9.3% | flat |
| 10 | United Arab Emirates | 3.14 million Tonnes | 2025 | up 39.9% | rising |
| 10 | Syrian Arab Republic | 17,584 Tonnes | 2025 | up 917.1% | volatile |
| 11 | Japan | 3.08 million Tonnes | 2025 | down 34.2% | falling |
| 12 | Germany | 2.28 million Tonnes | 2025 | up 7.8% | rising |
| 12 | Slovenia | 2,111 Tonnes | 2025 | down 12.9% | volatile |
| 13 | Italy | 2.21 million Tonnes | 2025 | down 3.0% | rising |
| 14 | Saudi Arabia | 2.05 million Tonnes | 2025 | up 17.1% | rising |
| 15 | Indonesia | 1.95 million Tonnes | 2025 | down 6.7% | flat |
| 16 | United Kingdom | 1.91 million Tonnes | 2025 | up 12.3% | rising |
| 17 | Mexico | 1.50 million Tonnes | 2025 | up 1.2% | rising |
| 18 | France | 1.28 million Tonnes | 2025 | up 9.2% | rising |
| 19 | Egypt | 1.20 million Tonnes | 2025 | up 51.0% | rising |
| 20 | Greece | 1.12 million Tonnes | 2025 | up 13.0% | rising |
| 21 | Panama | 1.07 million Tonnes | 2025 | up 22.8% | volatile |
| 22 | Canada | 1.05 million Tonnes | 2025 | up 3.8% | rising |
| 23 | South Africa | 1.05 million Tonnes | 2025 | down 5.1% | flat |
| 24 | Belgium | 937,709 Tonnes | 2025 | up 73.2% | rising |
| 25 | Chile | 927,924 Tonnes | 2025 | down 3.9% | flat |
| 26 | Philippines | 868,082 Tonnes | 2025 | up 13.2% | rising |
| 27 | Norway | 864,038 Tonnes | 2025 | down 10.9% | rising |
| 28 | New Zealand | 786,042 Tonnes | 2025 | down 0.2% | rising |
| 29 | Thailand | 755,889 Tonnes | 2025 | up 44.0% | rising |
| 30 | Argentina | 752,974 Tonnes | 2025 | up 3.5% | flat |
| 31 | Iraq | 694,167 Tonnes | 2025 | up 114.5% | rising |
| 32 | Nigeria | 679,160 Tonnes | 2025 | down 31.7% | falling |
| 33 | Taiwan | 644,627 Tonnes | 2025 | down 29.3% | falling |
| 34 | Venezuela | 600,636 Tonnes | 2025 | down 21.2% | falling |
| 35 | Portugal | 599,981 Tonnes | 2025 | up 22.7% | rising |
| 36 | Angola | 562,805 Tonnes | 2025 | up 48.7% | rising |
| 37 | Singapore | 549,404 Tonnes | 2025 | down 39.7% | falling |
| 38 | Qatar | 443,407 Tonnes | 2025 | down 29.0% | falling |
| 39 | Morocco | 405,934 Tonnes | 2025 | up 91.4% | rising |
| 40 | Peru | 369,455 Tonnes | 2025 | up 35.1% | rising |
| 41 | Mozambique | 368,723 Tonnes | 2025 | up 55.2% | rising |
| 42 | Sweden | 333,449 Tonnes | 2025 | down 36.9% | falling |
| 43 | Denmark | 330,174 Tonnes | 2025 | up 25.7% | rising |
| 44 | Lebanon | 304,716 Tonnes | 2025 | up 371.5% | volatile |
| 45 | Papua New Guinea | 259,513 Tonnes | 2025 | down 14.8% | falling |
| 46 | Uruguay | 255,940 Tonnes | 2025 | up 51.3% | rising |
| 47 | Algeria | 242,228 Tonnes | 2025 | up 49.4% | rising |
| 48 | Ecuador | 240,919 Tonnes | 2025 | down 3.1% | rising |
| 49 | Colombia | 224,332 Tonnes | 2025 | up 10.3% | rising |
| 50 | Malta | 223,955 Tonnes | 2025 | down 7.7% | flat |
| 51 | Finland | 219,848 Tonnes | 2025 | down 38.1% | falling |
| 52 | Oman | 219,496 Tonnes | 2025 | down 40.2% | falling |
| 53 | Bahamas | 212,249 Tonnes | 2025 | up 9.1% | falling |
| 54 | Guinea | 210,514 Tonnes | 2025 | up 97.9% | rising |
| 55 | Romania | 205,972 Tonnes | 2025 | up 86.4% | volatile |
| 56 | Iran | 194,046 Tonnes | 2025 | up 5.3% | flat |
| 57 | Iceland | 178,414 Tonnes | 2025 | up 69.6% | rising |
| 58 | Cameroon | 166,130 Tonnes | 2025 | up 5.5% | rising |
| 59 | Sri Lanka | 159,447 Tonnes | 2025 | up 65.7% | rising |
| 60 | Senegal | 149,918 Tonnes | 2025 | up 95.6% | rising |
| 61 | French Polynesia | 148,338 Tonnes | 2025 | up 83.0% | rising |
| 62 | Côte d’Ivoire | 140,849 Tonnes | 2025 | up 43.3% | rising |
| 63 | Ireland | 139,812 Tonnes | 2025 | down 15.3% | flat |
| 64 | Guyana | 120,338 Tonnes | 2025 | up 110.7% | rising |
| 65 | Cuba | 118,719 Tonnes | 2025 | down 48.2% | falling |
| 66 | Pakistan | 113,553 Tonnes | 2025 | down 14.5% | falling |
| 67 | Bangladesh | 111,863 Tonnes | 2025 | up 18.6% | flat |
| 68 | Ghana | 110,081 Tonnes | 2025 | down 23.8% | falling |
| 69 | Kuwait | 108,730 Tonnes | 2025 | down 7.2% | rising |
| 70 | Gibraltar | 102,830 Tonnes | 2025 | up 6.3% | rising |
| 71 | Trinidad and Tobago | 101,095 Tonnes | 2025 | down 39.4% | falling |
| 72 | Gabon | 100,974 Tonnes | 2025 | up 18.0% | rising |
| 73 | Greenland | 100,452 Tonnes | 2025 | up 35.1% | rising |
| 74 | Namibia | 95,477 Tonnes | 2025 | up 178.9% | rising |
| 75 | Mauritius | 93,612 Tonnes | 2025 | down 37.7% | falling |
| 76 | Brunei Darussalam | 91,841 Tonnes | 2025 | up 44.4% | rising |
| 77 | Yemen | 82,844 Tonnes | 2025 | up 39.4% | flat |
| 78 | Tunisia | 79,739 Tonnes | 2025 | up 42.3% | rising |
| 79 | Dominican Republic | 76,194 Tonnes | 2025 | up 11.3% | rising |
| 80 | Jamaica | 69,130 Tonnes | 2025 | up 4.0% | rising |
| 81 | Bulgaria | 64,064 Tonnes | 2025 | up 11.3% | rising |
| 82 | Cyprus | 63,824 Tonnes | 2025 | down 3.3% | flat |
| 83 | Tanzania | 59,823 Tonnes | 2025 | up 109.0% | rising |
| 84 | Seychelles | 58,494 Tonnes | 2025 | up 8.8% | rising |
| 85 | Georgia | 56,226 Tonnes | 2025 | up 163.9% | rising |
| 86 | Bahrain | 56,056 Tonnes | 2025 | up 48.8% | rising |
| 87 | Ukraine | 52,282 Tonnes | 2025 | down 68.2% | falling |
| 88 | Antarctica | 49,748 Tonnes | 2025 | up 58.9% | rising |
| 89 | Western Sahara | 44,971 Tonnes | 2025 | down 13.7% | flat |
| 90 | Jordan | 43,384 Tonnes | 2025 | up 66.1% | rising |
| 91 | Curaçao | 42,115 Tonnes | 2025 | up 8.8% | volatile |
| 92 | Réunion | 36,793 Tonnes | 2025 | up 111.8% | rising |
| 93 | Myanmar | 36,515 Tonnes | 2025 | up 78.1% | rising |
| 94 | Honduras | 36,513 Tonnes | 2025 | up 431.8% | rising |
| 95 | New Caledonia | 36,088 Tonnes | 2025 | down 39.5% | falling |
| 96 | Suriname | 35,049 Tonnes | 2025 | up 194.4% | rising |
| 97 | Turkmenistan | 34,582 Tonnes | 2025 | down 56.5% | falling |
| 98 | Marshall Islands | 30,822 Tonnes | 2025 | up 1.2% | rising |
| 99 | Kenya | 30,287 Tonnes | 2025 | down 38.5% | falling |
| 100 | Svalbard and Jan Mayen | 28,172 Tonnes | 2025 | up 966.9% | volatile |
| 101 | Puerto Rico | 27,884 Tonnes | 2025 | up 6.8% | falling |
| 102 | Liberia | 26,977 Tonnes | 2025 | up 154.8% | rising |
| 103 | Falkland Islands (Malvinas) | 26,858 Tonnes | 2025 | up 20.9% | rising |
| 104 | Solomon Islands | 26,070 Tonnes | 2025 | down 67.9% | falling |
| 105 | Azerbaijan | 25,663 Tonnes | 2025 | down 46.3% | falling |
| 106 | Samoa | 24,418 Tonnes | 2025 | down 16.6% | rising |
| 107 | Faroe Islands | 23,004 Tonnes | 2025 | down 67.4% | falling |
| 108 | United States Virgin Islands | 22,760 Tonnes | 2025 | down 26.9% | rising |
| 109 | Somalia | 22,005 Tonnes | 2024 | down 7.0% | rising |
| 110 | Vanuatu | 19,844 Tonnes | 2025 | up 80.1% | volatile |
| 111 | Kazakhstan | 17,905 Tonnes | 2025 | down 8.4% | rising |
| 112 | Maldives | 12,765 Tonnes | 2025 | down 32.7% | rising |
| 113 | Albania | 12,436 Tonnes | 2025 | up 13.7% | flat |
| 114 | Guadeloupe | 12,031 Tonnes | 2025 | up 24.8% | rising |
| 115 | British Virgin Islands | 11,099 Tonnes | 2025 | up 3.9% | falling |
| 116 | Saint Vincent and the Grenadines | 10,395 Tonnes | 2025 | down 1.7% | flat |
| 117 | American Samoa | 10,035 Tonnes | 2024 | up 80.4% | rising |
| 118 | Barbados | 7,685 Tonnes | 2025 | up 86.0% | volatile |
| 119 | Belize | 6,804 Tonnes | 2025 | up 545.5% | volatile |
| 120 | Saint Lucia | 6,739 Tonnes | 2025 | down 62.1% | volatile |
| 121 | Hong Kong | 5,669 Tonnes | 2025 | down 91.2% | volatile |
| 122 | Paraguay | 4,310 Tonnes | 2025 | down 59.4% | falling |
| 123 | Cook Islands | 3,906 Tonnes | 2025 | down 37.3% | volatile |
| 124 | Tonga | 3,844 Tonnes | 2025 | up 21.6% | rising |
| 125 | Monaco | 3,552 Tonnes | 2025 | up 102.1% | volatile |
| 126 | Montenegro | 2,958 Tonnes | 2025 | up 66.4% | volatile |
| 127 | Saint Kitts and Nevis | 1,728 Tonnes | 2025 | down 72.5% | volatile |
| 128 | Christmas Island | 1,465 Tonnes | 2025 | up 1,113.7% | volatile |
| 129 | Bermuda | 991.62 Tonnes | 2025 | up 19.4% | volatile |
| 130 | Cayman Islands | 935.83 Tonnes | 2025 | up 3.8% | volatile |
| 131 | Cocos (Keeling) Islands | 849.05 Tonnes | 2025 | — | volatile |
| 132 | Pitcairn | 279.97 Tonnes | 2025 | up 774.1% | volatile |
| 133 | South Georgia and the South Sandwich Islands | 261.73 Tonnes | 2025 | down 76.7% | volatile |
| 134 | Saint Helena | 256.75 Tonnes | 2025 | down 39.0% | volatile |
| 135 | Niue | 62.19 Tonnes | 2025 | up 99.8% | volatile |
| 136 | Wallis and Futuna | 50.72 Tonnes | 2025 | up 452.8% | volatile |
| 137 | Isle of Man | 15.29 Tonnes | 2025 | down 71.3% | volatile |
| 138 | Guernsey | 2.47 Tonnes | 2025 | down 85.2% | volatile |
Regions and income groups
Aggregates are excluded from the country ranking above so that a region can never outrank a country.
- World 113.95 million Tonnes
- Korea 1.82 million Tonnes
- Saint Martin 2,087 Tonnes
- Sint Maarten 1.15 Tonnes
- Åland 10,140 Tonnes
About this data
This experimental dataset includes annual, quarterly, and monthly information on carbon dioxide (CO2) emissions from maritime transport based on ship-tracking information collected via Automatic Identification System (AIS) transponders, covering all large vessels (above 300 gross tonnage) around the world, accessed via the United Nations Global Platform, from 2019 onwards. The CO2 emissions are estimated by the OECD, based on a consistent methodology across countries and include emissions from both domestic and international voyages. The CO2 emissions are classified using the ship-type classification used by the International Maritime Organisation (IMO) distinguishing between 19 vessel categories such as bulk carriers, tankers, and cruise ships. The database provides a measure of CO2 emissions on a territory basis for domestic navigation, which is used for reporting in the UN Framework Convention on Climate Change (UNFCCC) inventories; and also on a residence basis, which is used to estimate the emissions of maritime transport (H50 in the International Standard Industrial Classification of All Economic Activities, or ISIC) in the SEEA Air Emission Accounts (AEAs). Seven components of these CO2 emissions measures can be selected from the ‘Vessel emissions ’ filter. In the tables, these are also shown with the letters A, B, C, D, E, F and G. The aggregate measures of CO2 emissions are calculated as: Domestic navigation = A + C International navigation (memo item) = D + G Air emissions accounts: maritime transport (ISIC H50) = A + B + D + E + F For residence based measures, the allocation of emissions to countries is based on the residence of the companies that operate the ships. More information can be found on the dataset webpage