Marine protected areas are areas of intertidal or subtidal terrain--and overlying water and associated flora and fauna and historical and cultural features--that have been reserved by law or other effective means to protect part or all of the enclosed environment.
| 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| France | 20.4 | 19.8 | 19.2 | 26.2 | 30.7 | 45.0 | 48.9 | 50.4 | 49.8 | 49.8 | 49.8 | 49.8 |
| United Kingdom | 5.7 | 16.5 | 12.5 | 21.6 | 29.0 | 28.9 | 29.2 | 44.2 | 44.1 | 44.1 | 44.1 | 46.8 |
| Germany | 45.5 | 45.3 | 45.3 | 45.4 | 45.4 | 45.4 | 45.4 | 45.4 | 45.5 | 45.5 | 45.5 | 45.4 |
| Belgium | 36.7 | 36.6 | 36.6 | 36.7 | 36.6 | 36.7 | 36.7 | 36.7 | 38.1 | 38.1 | 38.1 | 38.3 |
| Netherlands | 21.6 | 21.6 | 21.6 | 21.5 | 26.7 | 26.7 | 26.9 | 26.9 | 26.9 | 26.9 | 26.9 | 33.6 |
| Poland | 22.6 | 22.6 | 22.6 | 22.6 | 22.6 | 22.6 | 22.6 | 22.6 | 22.6 | 22.6 | 22.6 | 24.0 |
| Lithuania | 11.1 | 11.1 | 16.3 | 21.5 | 25.6 | 25.6 | 25.6 | 25.6 | 25.6 | 25.6 | 25.6 | 23.2 |
| Romania | 8.0 | 8.4 | 8.4 | 8.5 | 23.1 | 23.1 | 23.1 | 23.1 | 23.1 | 23.1 | 23.1 | 22.1 |
| Estonia | 18.6 | 18.6 | 18.6 | 18.6 | 18.6 | 18.6 | 18.6 | 18.8 | 18.8 | 18.8 | 18.8 | 19.3 |
| United States | 13.3 | 10.8 | 27.7 | 41.1 | 41.0 | 41.1 | 41.1 | 37.4 | 19.0 | 19.0 | 19.1 | 19.0 |
| Denmark | 17.6 | 18.2 | 18.2 | 17.8 | 18.2 | 17.8 | 17.9 | 18.3 | 18.3 | 18.3 | 18.3 | 18.6 |
| Portugal | 6.6 | 6.7 | 6.7 | 8.4 | 16.2 | 16.6 | 16.6 | 16.8 | 16.8 | 16.9 | 16.9 | 16.8 |
| Latvia | 16.9 | 16.9 | 16.9 | 16.0 | 16.0 | 16.0 | 16.0 | 16.0 | 16.0 | 16.0 | 16.0 | 16.4 |
| Spain | 1.7 | 1.1 | 7.1 | 8.4 | 8.4 | 8.4 | 12.7 | 12.8 | 12.8 | 12.8 | 12.8 | 12.8 |
| Italy | 5.5 | 5.6 | 5.6 | 8.8 | 8.8 | 8.8 | 8.8 | 9.7 | 10.6 | 10.6 | 10.6 | 10.7 |
| Croatia | 2.0 | 9.1 | 9.1 | 8.5 | 8.5 | 8.5 | 8.5 | 9.0 | 9.0 | 9.0 | 9.0 | 9.3 |
| Canada | 0.8 | 0.8 | 0.9 | 0.9 | 0.9 | 2.9 | 3.1 | 8.8 | 8.9 | 9.1 | 9.1 | 9.2 |
| Bulgaria | 2.9 | 2.9 | 8.1 | 8.1 | 8.1 | 8.1 | 8.1 | 8.1 | 8.1 | 8.1 | 8.1 | 8.2 |
| Montenegro | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | 0.1 | 0.6 | 0.6 | 5.6 |
| Greece | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.7 |
| Albania | 1.4 | 1.0 | 1.0 | 2.7 | 2.7 | 2.7 | 2.8 | 2.8 | 2.8 | 2.8 | 2.8 | 3.4 |
| Slovenia | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 2.3 | 2.3 | 2.3 | 2.3 | 2.9 |
| Turkiye | 1.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 1.8 | 1.8 | 1.8 | 1.7 |
| Norway | 0.4 | 0.5 | 0.5 | 0.7 | 0.8 | 0.8 | 0.8 | 1.5 | 9.9 | 9.8 | 1.4 | 1.0 |
| Iceland | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 | 0.5 |