List of National Natural Landmarks in New York

! style="background-color:{{NNL color}}" align="center" | Name

! style="background-color:{{NNL color}}" class=unsortable | Image

! style="background-color:{{NNL color}}" | Date

! style="background-color:{{NNL color}}" | Location

! style="background-color:{{NNL color}}" | County

! style="background-color:{{NNL color}}" | Ownership

! style="background-color:{{NNL color}}" class=unsortable | Description

| Image:Pines in the Albany Pine Bush Preserve.jpg

| {{dts|2014|7}}

|

| Albany

| Mixed – state, county, municipal

| Protects a pine scrub forest that occupies an area of periglacial dunes.

| File:Almost Looks Like Fall (9732241394).jpg

| {{dts|1973|5}}

| Westerlo {{coord|42.4742

| Albany

| Private

| A {{convert|310|acre|km2|adj=on}} Nature Conservancy preserve including a pond and surrounding swamp and woodland. It is recognized for its great laurel tree population.

|

| {{dts|1964|3}}

| Bergen {{coord|43.091456

| Genesee

| Private

| A {{convert|2000|acre|km2|adj=on}} swamp that was the first National Natural Landmark to be designated. It is managed by the Bergen Swamp Preservation Society.

|

| {{dts|1973|5}}

| Montauk {{coord|41.077701

| Suffolk

| County

| An undeveloped fresh water lake where the Montaukett tribe lived until the mid-19th century. It is connected to Montauk County Park.

| 100px

| {{dts|2009|5}}

|

| Clinton (New York), Grand Isle (Vermont)

| Mixed – Federal, state, private

| The oldest known fossil reef on earth, with numerous Ordovician fossils demonstrating faunal succession.{{cite web |url=http://www.nature.nps.gov/nnl/site.cfm?Site=CHFO-VT |title=Chazy Fossil Reef |website=National Natural Landmarks Program |date=June 28, 2012 |publisher=National Park Service |access-date=September 16, 2016}}

|

| {{dts|1967|11}}

| Gowanda {{coord|42.421045

| Cattaraugus

| Private

| A {{convert|398|acre|km2|adj=on}} Nature Conservancy preserve, containing {{convert|80|acre|km2}} of old growth forest. It is known for its wildlife and its gorges which highlight the Onondaga Escarpment.

|

| {{dts|1973|5}}

| Dexter {{coord|43.98454

| Jefferson

| State

| A {{convert|1350|acre|km2|adj=on}} wetland marsh located at the Eastern end of Lake Ontario. It is a popular fishing and trapping area as well as a migratory bird layover.

|

| {{dts|1967|11}}

| Ellenville {{coord|41.671822

| Ulster

| State

| The largest open fault system in the United States results in ice caves which keeps ice year round and creates a cooler microclimate for more northern plants. Now part of Sam's Point Preserve.

|

| {{dts|1970|1}}

| Geneseo {{coord|42.775456

| Livingston

| Private

| An excellent example of Upper and Middle Devonian rock formations.

|

| {{dts|1967|11}}

| Le Roy

| Genesee

| Private

| An abandoned limestone quarry, it contains a well preserved Middle Devonian coral reef along with rare tabulate and rugose corals, crinoids, gastropods, and trilobites.

|

| {{dts|1972|6}}

| Perinton {{coord|43.097693

| Monroe

| Municipal

| Contains a pristine stand of beech-maple forest, a climax forest dominated by the American beech and sugar maple which covered most of the Northeastern United States when it was settled.

| 100px

| {{dts|1980|4}}

| Upper Nyack {{coord|41.124

| Rockland

| State

| A portion of the Palisades Sill in proximity to the Hudson River within two adjacent state parks.

| 100px

| {{dts|1974|5}}

| Stony Point {{coord|41.304

| Rockland

| State

| An island and marsh in the Hudson River which is a bird sanctuary and part of Bear Mountain State Park.

|

| {{dts|1967|4}}

| Alexandria Bay {{coord|44.396111

| Jefferson & St. Lawrence

| Private

| A rocky island in the Saint Lawrence River managed by The Nature Conservancy. Serves as a rookery for great blue herons.

|

|{{dts|2023|12}}

|{{coord|42.655833|N|74.019167|W|format=dms|display=inline}}

|Albany

|State

|{{Cite web |title=John Boyd Thacher State Park |url=https://www.nps.gov/subjects/nnlandmarks/site.htm?Site=JOBO-NY |access-date=2024-10-04 |website=www.nps.gov |language=en}}

| 100px

| {{dts|1973|5}}

| Ellisburg {{coord|43.769

| Jefferson

| State

| Adjacent to Southwick Beach State Park, this {{convert|3461|acre|km2|adj=on}} marsh is protected by a barrier beach from Lake Ontario, unlike nearby Dexter Marsh.

| 100px

| {{dts|1980|4}}

| Southold {{coord|41.12937

| Suffolk

| State

| A {{convert|2.5|mi|km|adj=on}} sand spit beach within a state park at the end of Long Island, demonstrating plant succession from salt marsh to maritime red cedar forest.

|

| {{dts|1983|5}}

| Dryden

| Tompkins

| Private

| A small acidic kettle bog managed by Cornell Plantations which is part of Cornell University. It is used for scientific research on the lichens and their methane gas production.

| 100px

| {{dts|1967|11}}

| Mendon {{coord|43.033333

| Monroe

| County

| A {{convert|2500|acre|km2|adj=on}} county park known for its birdwatching and its unusual glacial geology, including kettle holes, eskers, kames, and a floating sphagnum moss peat bog known as the Devils Bathtub.

| 100px

| {{dts|1964|3}}

| Bedford {{coord|41.185951

| Westchester

| Private

| A preserve known for its old growth climax hemlock forest and the Mianus River. The core area was the first land purchase deal by The Nature Conservancy.{{cite web |url=http://www.nature.org/aboutus/success/about/art1812.html |archive-url=https://web.archive.org/web/20090803013718/http://www.nature.org/aboutus/success/about/art1812.html |archive-date=August 3, 2009 |title=Success Stories - Mianus River Gorge: The Pioneer Project |publisher=The Nature Conservancy |access-date=September 16, 2016}}

|

| {{dts|1973|5}}

| Seneca Falls {{coord|42.97

| Seneca

| Federal

| A {{convert|7000|acre|km2|adj=on}} National Wildlife Refuge containing one of the best examples of undisturbed swamp woodlands in New York or New England. It is a major stop for migratory birds.

| 100 px

| {{dts|1976|5}}

| Little Falls {{coord|43.039771

| Herkimer

| State

| An igneous intrusion in the Erie Canal with the Little Falls at one end. It became an island when locks were built so boats could avoid the {{convert|40|ft|m|abbr=on}} falls. It is known for its extremely large {{convert|40|–|50|ft}} glacial potholes created by retreating glaciers as well as being popular with local rock climbers.

|

| {{dts|1973|5}}

| Houghton {{coord|42.398599

| Allegany

| Private

| An {{convert|83|acre|m2|adj=on}} glacial kettle lake which filled with melt water and rain. Over time, sphagnum moss has grown over the open water, turning it into an acidic bog. It is managed by The Nature Conservancy.

|

| {{dts|1973|5}}

| Medina {{coord|43.135003

| Genesee & Orleans

| Mixed – Federal, state

| The marsh contains a state reserve, Oak Orchard Wildlife Management Area, and a national reserve, the Iroquois National Wildlife Refuge, both of which are known as major stopover points for migratory birds. It was created by a partial blockage of the Oak Orchard River by glacial drift and an outcrop of limestone and dolomite known as the Lockport formation which forms the Niagara Escarpment.

| 100px

| {{dts|1984|11}}

| Hudson River {{coord|40.964507

| Rockland

| State

| A line of dramatic {{convert|350|ft|m|adj=on}} cliffs of the Palisades Sill along the west side of the lower Hudson River.

| 100px

| {{dts|1967|4}}

| Saratoga Springs {{coord|43.083047

| Saratoga

| Private

| This private park preserves an area of ancient stromatolites in a fossilized ancient Cambrian reef. Stromatolites "were first recognized, discovered, and interpreted in North America" here in 1922. The park, which is now closed, was a childhood inspiration for Stephen Jay Gould.

| 100px

| {{dts|1973|5}}

| Fayetteville {{coord|43.049

| Onondaga

| State

| Part of Green Lakes State Park, this lake is a rare meromictic lake is surrounded by a well preserved mesophytic forest

| 100px

| {{dts|1973|5}}

| Pine Plains {{coord|41.961118

| Dutchess

| Private

| A {{convert|75|acre|m2|adj=on}} glacial kettle pond and surrounding {{convert|507|acre|km2|adj=on}} nature preserve managed by The Nature Conservancy. It is the source of Wappinger Creek, a tributary of the Hudson River that drains much of Dutchess County. It is known for its calcareous bogs, distinct from the acidic bogs found elsewhere in the Northeast.

| 100px

| {{dts|1973|5}}

| Arcadia {{coord|43.144648

| Wayne

| Private

| A sphagnum bog managed by the Bergen Swamp Preservation Society.