Cook Islands vs Tanzania: Protected area coverage of marine key biodiversity areas
Cook Islands
52.1%
in 2025
Tanzania
54.0%
in 2025
Cook Islands rank
81st
Tanzania rank
79th
Protected area coverage of marine key biodiversity areas over time
- Cook Islands
- Tanzania
How they compare
Tanzania currently reports 54.0% against 52.1% in Cook Islands, a difference of 1.9%.
Across all 26 years both countries report, Tanzania has been ahead every year.
Cook Islands ranks 81st and Tanzania ranks 79th of 190 countries.
Tanzania has averaged higher in every one of the 3 decades both report.
Head to head by decade
| Decade | Cook Islands | Tanzania | Difference | Ahead |
|---|---|---|---|---|
| 2000s | 19.9% | 50.3% | 30.4% | Tanzania |
| 2010s | 29.6% | 54.0% | 24.5% | Tanzania |
| 2020s | 52.1% | 54.0% | 1.9% | Tanzania |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher protected area coverage of marine key biodiversity areas, Cook Islands or Tanzania?
- Tanzania, at 54.0% against 52.1% in Cook Islands as of 2025.
- What is the difference in protected area coverage of marine key biodiversity areas between Cook Islands and Tanzania?
- 1.9%, with Tanzania ahead.
- How many years of comparable data are there for Cook Islands and Tanzania?
- 26 years are reported by both, from 2000 to 2025.
- How do Cook Islands and Tanzania rank globally for protected area coverage of marine key biodiversity areas?
- Cook Islands ranks 81st and Tanzania ranks 79th 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 (%).