Maritime transport CO2 emissions in OECD
OECD: Maritime transport CO2 emissions was 54.81 million Tonnes in 2025. ▲ Rising
Maritime transport CO2 emissions in OECD, 2019–2025
Source: Organisation for Economic Co-operation and Development. Measured in Tonnes.
Analysis
OECD recorded 54.81 million Tonnes for maritime transport co2 emissions in 2025. That is the lowest value across all 7 years on record.
That represents a change of down 20.1% on the previous year and down 5.2% over ten years.
OECD ranks 1st of 138 countries on this measure, in the top 10%.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 2010s | 57.78 million Tonnes | 57.78 million Tonnes | 57.78 million Tonnes | 1 |
| 2020s | 66.64 million Tonnes | 54.81 million Tonnes | 90.79 million Tonnes | 6 |
Countries ranked near OECD
- 2 China (People’s Republic of) 24.22 million Tonnes compare
- 3 United States 9.33 million Tonnes compare
- 4 Brazil 6.01 million Tonnes compare
More climate change data for OECD
- Emissions from livestock — Emissions (CO2eq) 984,128 kt (2050)
- Emissions from crops — Emissions 1,467 kt (2050)
- Emissions from crops — Emissions 842.7 kt (2050)
- Emissions from crops — Emissions (CO2eq) from CH4 41,088 kt (2050)
- Emissions from crops — Emissions (CO2eq) from N2O 223,315 kt (2050)
- Emissions from crops — Emissions (CO2eq) 264,403 kt (2050)
- Emissions from livestock — Emissions 906.49 kt (2050)
- Emissions from livestock — Emissions 26,568 kt (2050)
- Emissions from livestock — Emissions (CO2eq) from N2O 240,219 kt (2050)
- Emissions from livestock — Emissions (CO2eq) from CH4 743,908 kt (2050)
Frequently asked questions
- What is maritime transport co2 emissions in OECD?
- Maritime transport co2 emissions in OECD was 54.81 million Tonnes in 2025, according to Organisation for Economic Co-operation and Development.
- What is the highest maritime transport co2 emissions recorded in OECD?
- The highest recorded value was 90.79 million Tonnes in 2022.
- What is the lowest maritime transport co2 emissions recorded in OECD?
- The lowest recorded value was 54.81 million Tonnes in 2025.
- How does OECD rank for maritime transport co2 emissions?
- OECD ranks 1st out of 138 countries with data for 2025.
- Is maritime transport co2 emissions rising or falling in OECD?
- Over the last ten years it is down 5.2%. The long-run trend across the full record is rising.
- Where does this OECD data come from?
- The figures come from Organisation for Economic Co-operation and Development, published as part of Maritime transport CO2 emissions (experimental). Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 7 observations, free to reuse under OECD Terms and Conditions (attribution required).
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