Over 19.75 per cent of Australia's landmass is protected in the National Reserve System (NRS) and is made up of over 13,500 protected areas. In all, the NRS covers an area bigger than the Northern Territory.
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| IUCN Category | Number | Area (ha) | Average size (ha) | % of Australia | Contribution to NRS |
|---|---|---|---|---|---|
| Ia | 2,619 | 15,981,368 | 6,102 | 2.08% | 10.52% |
| Ib | 66 | 3,847,645 | 58,298 | 0.50% | 2.53% |
| II | 1,096 | 38,190,170 | 34,845 | 4.97% | 25.14% |
| III | 2,395 | 1,867,857 | 780 | 0.24% | 1.23% |
| IV | 4,248 | 2,401,392 | 565 | 0.31% | 1.58% |
| I-IV Total | 10,424 | 62,288,431 | 5,975 | 8.10% | 41.01% |
| V | 359 | 7,924,748 | 22,075 | 1.03% | 5.22% |
| VI | 1,320 | 81,450,986 | 61,705 | 10.59% | 53.63% |
| V-VI Total | 1,679 | 89,375,734 | 53,232 | 11.62% | 58.85% |
| Not Applicable | 8 | 2,444 | 305 | 0.00% | 0.00% |
| Not Assigned | 1,377 | 214,860 | 156 | 0.03% | 0.14% |
| Not Reported | 1 | 0.4 | 0.4 | 0.00% | 0.00% |
| TOTAL | 13,488 | 151,881,469 | 11,260 | 19.75% | 100.00% |