What is the difference in protected area coverage of marine key biodiversity areas between Norfolk Island and Tanzania, United Republic of?

0.4%, with Norfolk Island ahead.

How many years of comparable data are there for Norfolk Island and Tanzania, United Republic of?

26 years are reported by both, from 2000 to 2025.

Norfolk Island vs Tanzania, United Republic of: Protected area coverage of marine key biodiversity areas

Norfolk Island

54.4%

in 2025

Tanzania, United Republic of

54.0%

in 2025

Norfolk Island rank

76th

Tanzania, United Republic of rank

79th

Protected area coverage of marine key biodiversity areas over time

Norfolk Island
Tanzania, United Republic of

How they compare

Norfolk Island currently reports 54.4% against 54.0% in Tanzania, United Republic of, a difference of 0.4%.

The two have swapped places 1 time across 26 shared years of data; in 2000 it was Tanzania, United Republic of ahead.

Norfolk Island ranks 76th and Tanzania, United Republic of ranks 79th of 190 countries.

Across the 3 decades both report, Norfolk Island averaged higher in 1 and Tanzania, United Republic of in 2.

Head to head by decade

Decade	Norfolk Island	Tanzania, United Republic of	Difference	Ahead
2000s	27.7%	50.3%	22.6%	Tanzania, United Republic of
2010s	33.1%	54.0%	21.0%	Tanzania, United Republic of
2020s	54.4%	54.0%	0.3%	Norfolk Island

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 Tanzania, United Republic of?: Norfolk Island, at 54.4% against 54.0% in Tanzania, United Republic of as of 2025.
What is the difference in protected area coverage of marine key biodiversity areas between Norfolk Island and Tanzania, United Republic of?: 0.4%, with Norfolk Island ahead.
How many years of comparable data are there for Norfolk Island and Tanzania, United Republic of?: 26 years are reported by both, from 2000 to 2025.
How do Norfolk Island and Tanzania, United Republic of rank globally for protected area coverage of marine key biodiversity areas?: Norfolk Island ranks 76th and Tanzania, United Republic of 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.

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Norfolk Island vs Tanzania, United Republic of: Protected area coverage of marine key biodiversity areas. Statizoid, drawing on BirdLife International, IUCN and UNEP-WCMC – processed by Our World in Data. Retrieved 04 September 2026, from https://environment.statizoid.com/compare/protected-area-coverage-of-marine-key-biodiversity-areas/norfolk-island/tanzania/

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About this data

Indicator: Protected area coverage of marine key biodiversity areas
Unit: %
Source: BirdLife International, IUCN and UNEP-WCMC – processed by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 190 places, 4,940 data points, 2000–2025
Last refreshed: 28 August 2026

Average proportion of Marine Key Biodiversity Areas (KBAs) covered by protected areas (%).