Norfolk Island vs Saint Helena: Protected area coverage of marine key biodiversity areas
Norfolk Island
54.4%
in 2025
Saint Helena
54.8%
in 2025
Norfolk Island rank
76th
Saint Helena rank
75th
Protected area coverage of marine key biodiversity areas over time
- Norfolk Island
- Saint Helena
How they compare
Saint Helena currently reports 54.8% against 54.4% in Norfolk Island, a difference of 0.4%.
The two have swapped places 1 time across 26 shared years of data; in 2000 it was Norfolk Island ahead.
Norfolk Island ranks 76th and Saint Helena ranks 75th of 190 countries.
Across the 3 decades both report, Norfolk Island averaged higher in 1 and Saint Helena in 2.
Head to head by decade
| Decade | Norfolk Island | Saint Helena | Difference | Ahead |
|---|---|---|---|---|
| 2000s | 27.7% | 20.0% | 7.7% | Norfolk Island |
| 2010s | 33.1% | 39.9% | 6.9% | Saint Helena |
| 2020s | 54.4% | 54.8% | 0.4% | Saint Helena |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher protected area coverage of marine key biodiversity areas, Norfolk Island or Saint Helena?
- Saint Helena, at 54.8% against 54.4% in Norfolk Island as of 2025.
- What is the difference in protected area coverage of marine key biodiversity areas between Norfolk Island and Saint Helena?
- 0.4%, with Saint Helena ahead.
- How many years of comparable data are there for Norfolk Island and Saint Helena?
- 26 years are reported by both, from 2000 to 2025.
- How do Norfolk Island and Saint Helena rank globally for protected area coverage of marine key biodiversity areas?
- Norfolk Island ranks 76th and Saint Helena ranks 75th of 190 countries.
- Where does this data come from?
- BirdLife International, IUCN and UNEP-WCMC – processed by Our World in Data, published as Protected area coverage of marine key biodiversity areas. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Average proportion of Marine Key Biodiversity Areas (KBAs) covered by protected areas (%).