| State | Number of landmarks |
Number, non- duplicated[1] |
Earliest declared[2] |
Latest declared[2] |
Image | |
|---|---|---|---|---|---|---|
| 1 | Alabama | 6 | 6 | October 1971 | November 1987 | |
| 2 | Alaska | |||||
| 3 | Arizona | |||||
| 4 | Arkansas | |||||
| 5 | California | |||||
| 6 | Colorado | |||||
| 7 | Connecticut | October 9, 1960 | August 7, 2001 | |||
| 8 | Delaware | |||||
| 9 | Florida | |||||
| 10 | Georgia | |||||
| 11 | Hawaii | |||||
| 12 | Idaho | |||||
| 13 | Illinois | |||||
| 14 | Indiana | |||||
| 15 | Iowa | |||||
| 16 | Kansas | |||||
| 17 | Kentucky | |||||
| 18 | Louisiana | |||||
| 19 | Maine | |||||
| 20 | Maryland | |||||
| 21 | Massachusetts | |||||
| 22 | Michigan | |||||
| 23 | Minnesota | |||||
| 24 | Mississippi | |||||
| 25 | Missouri | |||||
| 26 | Montana | |||||
| 27 | Nebraska | |||||
| 28 | Nevada | |||||
| 29 | New Hampshire | |||||
| 30 | New Jersey | |||||
| 31 | New Mexico | |||||
| 32 | New York | 26 | 25[3] | March 1964 | November 1984 | 
|
| 33 | North Carolina | |||||
| 34 | North Dakota | |||||
| 35 | Ohio | |||||
| 36 | Oklahoma | |||||
| 37 | Oregon | |||||
| 38 | Pennsylvania (Philadelphia alone) |
|||||
| 39 | Rhode Island | |||||
| 40 | South Carolina | |||||
| 41 | South Dakota | |||||
| 42 | Tennessee | |||||
| 43 | Texas | |||||
| 44 | Utah | |||||
| 45 | Vermont | |||||
| 46 | Virginia | |||||
| 47 | Washington | |||||
| 48 | West Virginia | |||||
| 49 | Wisconsin | |||||
| 50 | Wyoming | |||||
| 51 | District of Columbia |
- ^ Sites shared across more than one state are counted with the state credited by the National Park Service in "National Natural Landmarks Survey: List of National Natural Landmarks by State".
- ^ a b National Park Service (November 2007), National Natural Landmarks Survey: List of National Natural Landmarks by State (PDF), retrieved 2008-04-16
- ^ Palisades of the Hudson shared with New Jersey