Most Biodiverse States 2025
Total # of Species
1,000
2,000
3,000
4,000
5,000
6,000
7,000
State | Total # of Species↓ | % of Species at Risk | Species Diversity Rank (01-51) | |
|---|---|---|---|---|
 | California | 6,717 | 29% | 1st |
 | Texas | 6,273 | 10% | 2nd |
 | Arizona | 4,759 | 14% | 3rd |
 | New Mexico | 4,583 | 10% | 4th |
 | Alabama | 4,533 | 15% | 5th |
 | Georgia | 4,436 | 13% | 6th |
 | Florida | 4,368 | 14% | 7th |
 | Oregon | 4,136 | 11% | 8th |
 | North Carolina | 4,131 | 10% | 9th |
 | Utah | 3,892 | 15% | 10th |
 | Nevada | 3,872 | 16% | 11th |
 | Virginia | 3,803 | 8% | 12th |
 | Tennessee | 3,772 | 10% | 13th |
 | South Carolina | 3,701 | 9% | 14th |
 | Oklahoma | 3,616 | 5% | 15th |
 | Colorado | 3,597 | 9% | 16th |
 | Mississippi | 3,580 | 7% | 17th |
 | Louisiana | 3,495 | 5% | 18th |
 | Arkansas | 3,415 | 6% | 19th |
 | Washington | 3,375 | 7% | 20th |
 | Missouri | 3,340 | 5% | 21st |
 | New York | 3,333 | 5% | 22nd |
 | Illinois | 3,258 | 5% | 23rd |
 | Kentucky | 3,258 | 7% | 23rd |
 | Idaho | 3,205 | 7% | 25th |
 | Wyoming | 3,184 | 7% | 26th |
 | Ohio | 3,152 | 4% | 27th |
 | Maryland | 3,148 | 4% | 28th |
 | Michigan | 3,135 | 4% | 29th |
 | Pennsylvania | 3,135 | 4% | 29th |
 | Indiana | 3,098 | 5% | 31st |
 | New Jersey | 3,022 | 4% | 32nd |
 | Montana | 2,921 | 5% | 33rd |
 | West Virginia | 2,873 | 5% | 34th |
 | Wisconsin | 2,869 | 3% | 35th |
 | Minnesota | 2,817 | 3% | 36th |
 | Kansas | 2,778 | 3% | 37th |
 | Massachusetts | 2,765 | 4% | 38th |
 | Nebraska | 2,587 | 2% | 39th |
 | Iowa | 2,533 | 3% | 40th |
 | Connecticut | 2,497 | 3% | 41st |
 | South Dakota | 2,406 | 2% | 42nd |
 | Maine | 2,352 | 4% | 43rd |
 | New Hampshire | 2,327 | 3% | 44th |
 | Vermont | 2,274 | 3% | 45th |
 | Delaware | 2,244 | 3% | 46th |
 | Rhode Island | 2,078 | 3% | 47th |
 | District of Columbia | 1,909 | 2% | 48th |
 | North Dakota | 1,889 | 2% | 49th |
 | Alaska | 1,835 | 8% | 50th |
 | Hawaii | 1,418 | 63% | 51st |
- Species Diversity: Indicates the variety of plants and animals in different regions. Higher diversity indicates a greater variety of life forms.
- Risk Levels: Indicates the percentage of species facing extinction. A higher percentage signals greater risk to local biodiversity.
- Vascular Plant Diversity: Indicates the range of plant species in an area. Diverse plant life indicates a wide array of animals.
- Mammal Diversity: Indicates the number of mammal species in a region. More mammal species indicate diverse habitats.
- Bird Diversity: Indicates the variety of bird species present. Birds play important roles in ecosystems.
- Reptile Diversity: Indicates the number of reptile species in an area, like snakes and lizards.
- Freshwater Fish Diversity: Indicates the richness of fish species in freshwater environments. Diverse fish populations signify healthy water systems.
- Amphibian Diversity: Indicates the number of amphibian species, such as frogs and salamanders, in a region.
- Freshwater Fish Diversity (repeated): Emphasizes the significance of diverse fish populations in maintaining healthy freshwater ecosystems. More fish species contribute to better water quality.
