Most Biodiverse States 2025
California
6,717
Texas
6,273
Arizona
4,759
New Mexico
4,583
Alabama
4,533
Georgia
4,436
Florida
4,368
Oregon
4,136
North Carolina
4,131
Utah
3,892
Nevada
3,872
Virginia
3,803
Tennessee
3,772
South Carolina
3,701
Oklahoma
3,616
Colorado
3,597
Mississippi
3,580
Louisiana
3,495
Arkansas
3,415
Washington
3,375
Missouri
3,340
New York
3,333
Illinois
3,258
Kentucky
3,258
Idaho
3,205
Wyoming
3,184
Ohio
3,152
Maryland
3,148
Michigan
3,135
Pennsylvania
3,135
Indiana
3,098
New Jersey
3,022
Montana
2,921
West Virginia
2,873
Wisconsin
2,869
Minnesota
2,817
Kansas
2,778
Massachusetts
2,765
Nebraska
2,587
Iowa
2,533
Connecticut
2,497
South Dakota
2,406
Maine
2,352
New Hampshire
2,327
Vermont
2,274
Delaware
2,244
Rhode Island
2,078
District of Columbia
1,909
North Dakota
1,889
Alaska
1,835
Hawaii
1,418
State | Total # of Species↓ | % of Species at Risk | Species Diversity Rank (01-51) | # of Vascular Plant Species | % of Vascular Plant Species at Risk | # of Mammal Species | % of Freshwater Fish Species at Risk | # of Bird Species | % of Bird Species at Risk | # of Reptile Species | % of Reptile Species at Risk | # of Amphibian Species | % of Amphibian Species at Risk | # of Freshwater Fish Species | % of Freshwater Fish Species at Risk | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | California | 6,717 | 29% | 1 | 5,418 | 30.7% | 195 | 16.4% | 415 | 4.8% | 86 | 16.3% | 57 | 49.1% | 62 | 50% |
 | Texas | 6,273 | 10% | 2 | 4,509 | 9.4% | 159 | 10.7% | 477 | 2.9% | 149 | 14.1% | 71 | 21.1% | 175 | 23.4% |
 | Arizona | 4,759 | 14% | 3 | 3,512 | 15.3% | 138 | 2.9% | 435 | 1.8% | 102 | 7.8% | 25 | 24% | 28 | 85.7% |
 | New Mexico | 4,583 | 10% | 4 | 3,305 | 11.1% | 154 | 7.1% | 447 | 1.6% | 98 | 6.1% | 26 | 15.4% | 54 | 48.1% |
 | Alabama | 4,533 | 15% | 5 | 2,902 | 9.4% | 63 | 12.7% | 326 | 1.8% | 85 | 11.8% | 68 | 17.6% | 284 | 19% |
 | Georgia | 4,436 | 13% | 6 | 2,994 | 11.1% | 92 | 14.1% | 328 | 2.7% | 83 | 14.5% | 77 | 19.5% | 250 | 16.8% |
 | Florida | 4,368 | 14% | 7 | 3,038 | 14.1% | 86 | 18.6% | 386 | 3.1% | 90 | 20% | 56 | 12.5% | 136 | 9.6% |
 | Oregon | 4,136 | 11% | 8 | 3,161 | 11% | 150 | 4% | 338 | 2.4% | 32 | 3.1% | 31 | 38.7% | 65 | 29.2% |
 | North Carolina | 4,131 | 10% | 9 | 2,771 | 9.2% | 107 | 7.5% | 360 | 2.5% | 68 | 7.4% | 84 | 22.6% | 206 | 13.6% |
 | Utah | 3,892 | 15% | 10 | 2,966 | 16.6% | 126 | 2.4% | 296 | 2% | 50 | 16 | 12.5% | 28 | 60.7% | |
 | Nevada | 3,872 | 16% | 11 | 2,875 | 15.7% | 123 | 3.3% | 299 | 2.7% | 52 | 3.8% | 13 | 38.5% | 48 | 56.3% |
 | Virginia | 3,803 | 8% | 12 | 2,580 | 6% | 80 | 8.8% | 322 | 1.9% | 60 | 5% | 74 | 13.5% | 202 | 14.4% |
 | Tennessee | 3,772 | 10% | 13 | 2,407 | 6.6% | 76 | 9.2% | 278 | 2.2% | 55 | 3.6% | 72 | 20.8% | 283 | 21.6% |
 | South Carolina | 3,701 | 9% | 14 | 2,582 | 8.2% | 96 | 13.5% | 313 | 1.6% | 72 | 11.1% | 66 | 13.6% | 120 | 6.7% |
 | Oklahoma | 3,616 | 5% | 15 | 2,355 | 3.1% | 104 | 8.7% | 346 | 2.9% | 80 | 2.5% | 51 | 3.9% | 171 | 9.4% |
 | Colorado | 3,597 | 9% | 16 | 2,550 | 11.2% | 133 | 1.5% | 371 | 1.9% | 49 | 4.1% | 17 | 48 | 18.8% | |
 | Mississippi | 3,580 | 7% | 17 | 2,369 | 5.1% | 56 | 7.1% | 301 | 2% | 82 | 13.4% | 58 | 10.3% | 209 | 9.6% |
 | Louisiana | 3,495 | 5% | 18 | 2,385 | 4.2% | 59 | 6.8% | 322 | 2.2% | 78 | 7.7% | 51 | 3.9% | 160 | 9.4% |
 | Arkansas | 3,415 | 6% | 19 | 2,202 | 3.7% | 69 | 8.7% | 312 | 2.2% | 64 | 1.6% | 49 | 10.2% | 203 | 14.3% |
 | Washington | 3,375 | 7% | 20 | 2,476 | 7.6% | 127 | 7.1% | 372 | 3% | 21 | 4.8% | 25 | 32% | 51 | 7.8% |
 | Missouri | 3,340 | 5% | 21 | 2,095 | 3.3% | 72 | 8.3% | 311 | 1.9% | 67 | 3% | 42 | 2.4% | 200 | 11% |
 | New York | 3,333 | 5% | 22 | 2,215 | 3.7% | 91 | 6.6% | 327 | 1.2% | 35 | 14.3% | 32 | 3.1% | 159 | 7.5% |
 | Illinois | 3,258 | 5% | 23 | 2,155 | 2.5% | 67 | 7.5% | 311 | 1.9% | 60 | 5% | 39 | 2.6% | 188 | 9.6% |
 | Kentucky | 3,258 | 7% | 23 | 2,085 | 3.8% | 70 | 10% | 284 | 2.5% | 52 | 3.8% | 53 | 3.8% | 230 | 14.8% |
 | Idaho | 3,205 | 7% | 25 | 2,438 | 7% | 105 | 1% | 284 | 0.7% | 23 | 12 | 8.3% | 42 | 19% | |
 | Wyoming | 3,184 | 7% | 26 | 2,286 | 7.3% | 109 | 2.8% | 295 | 1.7% | 22 | 13 | 7.7% | 56 | 16.1% | |
 | Ohio | 3,152 | 4% | 27 | 2,062 | 2.2% | 66 | 6.1% | 280 | 1.8% | 40 | 5% | 39 | 5.1% | 148 | 10.1% |
 | Maryland | 3,148 | 4% | 28 | 2,234 | 3.4% | 88 | 3.4% | 305 | 1.3% | 46 | 10.9% | 40 | 5% | 89 | 4.5% |
 | Michigan | 3,135 | 4% | 29 | 2,097 | 2.7% | 67 | 1.5% | 303 | 1% | 27 | 7.4% | 23 | 137 | 8.8% | |
 | Pennsylvania | 3,135 | 4% | 29 | 2,202 | 2.9% | 68 | 4.4% | 267 | 1.9% | 37 | 8.1% | 36 | 5.6% | 163 | 8% |
 | Indiana | 3,098 | 5% | 31 | 2,063 | 2.5% | 68 | 8.8% | 275 | 1.8% | 58 | 5.2% | 38 | 5.3% | 189 | 11.1% |
 | New Jersey | 3,022 | 4% | 32 | 2,074 | 3.1% | 71 | 5.6% | 340 | 1.5% | 42 | 2.4% | 31 | 67 | 3% | |
 | Montana | 2,921 | 5% | 33 | 2,239 | 5.1% | 104 | 1.9% | 285 | 1.8% | 17 | 14 | 7.1% | 56 | 8.9% | |
 | West Virginia | 2,873 | 5% | 34 | 1,897 | 3.6% | 68 | 5.9% | 237 | 1.3% | 39 | 47 | 12.8% | 151 | 9.3% | |
 | Wisconsin | 2,869 | 3% | 35 | 1,890 | 2.2% | 67 | 279 | 1.8% | 35 | 2.9% | 19 | 146 | 6.2% | ||
 | Minnesota | 2,817 | 3% | 36 | 1,809 | 1.7% | 80 | 1.3% | 308 | 1.3% | 29 | 3.4% | 20 | 135 | 6.7% | |
 | Kansas | 2,778 | 3% | 37 | 1,778 | 1.9% | 82 | 3.7% | 341 | 2.3% | 64 | 3.1% | 29 | 121 | 8.3% | |
 | Massachusetts | 2,765 | 4% | 38 | 1,958 | 2.6% | 74 | 12.2% | 303 | 1.3% | 29 | 20.7% | 20 | 46 | 4.3% | |
 | Nebraska | 2,587 | 2% | 39 | 1,561 | 1.3% | 83 | 2.4% | 346 | 2% | 47 | 2.1% | 13 | 87 | 6.9% | |
 | Iowa | 2,533 | 3% | 40 | 1,583 | 1.9% | 68 | 1.5% | 274 | 1.8% | 47 | 4.3% | 23 | 139 | 7.2% | |
 | Connecticut | 2,497 | 3% | 41 | 1,823 | 2.4% | 62 | 4.8% | 273 | 1.1% | 27 | 3.7% | 22 | 46 | 4.3% | |
 | South Dakota | 2,406 | 2% | 42 | 1,504 | 0.9% | 90 | 2.2% | 339 | 1.8% | 31 | 15 | 89 | 5.6% | ||
 | Maine | 2,352 | 4% | 43 | 1,601 | 3% | 73 | 9.6% | 293 | 1.4% | 21 | 19% | 17 | 54 | 5.6% | |
 | New Hampshire | 2,327 | 3% | 44 | 1,631 | 2.1% | 64 | 1.6% | 283 | 1.4% | 19 | 10.5% | 21 | 50 | 6% | |
 | Vermont | 2,274 | 3% | 45 | 1,622 | 2.3% | 59 | 3.4% | 240 | 0.4% | 18 | 21 | 81 | 2.5% | ||
 | Delaware | 2,244 | 3% | 46 | 1,598 | 3.1% | 54 | 1.9% | 295 | 0.7% | 37 | 2.7% | 27 | 62 | 1.6% | |
 | Rhode Island | 2,078 | 3% | 47 | 1,392 | 2.1% | 53 | 9.4% | 277 | 1.1% | 25 | 16% | 18 | 37 | 5.4% | |
 | District of Columbia | 1,909 | 2% | 48 | 1,314 | 1.8% | 43 | 2.3% | 241 | 0.8% | 31 | 3.2% | 24 | 65 | 3.1% | |
 | North Dakota | 1,889 | 2% | 49 | 1,201 | 0.9% | 85 | 2.4% | 318 | 1.6% | 15 | 12 | 87 | 6.9% | ||
 | Alaska | 1,835 | 8% | 50 | 1,354 | 8% | 96 | 14.6% | 269 | 5.6% | 0 | 6 | 44 | 4.5% | ||
 | Hawaii | 1,418 | 63% | 51 | 1,249 | 64.3% | 7 | 28.6% | 115 | 42.6% | 4 | 100% | 0 | 5 | 80% |
- 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.
