Dagny Johnson Key Largo Hammock Botanical State Park

{{Short description|State park in Florida, United States}}

{{Use mdy dates|date=August 2023}}

{{Infobox protected area

| name = Dagny Johnson Key Largo Hammock Botanical State Park

| iucn_category = V

| map = Florida#USA

| map_caption =

| photo = File:Key Largo FL Dagny Johnson Key SP path01.jpg

| photo_caption = Trail through the park

| location = Monroe County, Florida, US

| nearest_city = Key Largo, Florida

| coordinates = {{coord|25|10|32|N|80|22|08|W|region:US-FL|display=inline, title}}

| area =

| visitation_num =

| visitation_year =

| governing_body = Florida Department of Environmental Protection

}}

The Dagny Johnson Key Largo Hammock Botanical State Park is a Florida State Park, located in the center of Key Largo in the Florida Keys, on County Road 905, one-quarter mile north of its intersection with the Overseas Highway (US 1).

The park's name honors Dagny Johnson, a local environmentalist activist, and is constructed on land bought up in 1982 after the financial demise of Port Bougainville, a project which would have included 15 hotels and over 2000 condos.{{cite news|url=https://news.google.com/newspapers?id=Z9ohAAAAIBAJ&pg=1569,1661650&dq=key-largo-woodrat&hl=en|title=Condos May Kill Off American Crocodiles: It's the 11th Hour for the American Crocodile and other Endangered Species that Live on Key Largo|last=Dahlburg|first=John-Thor|date=18 December 1982|publisher=Daytona Beach Morning Journal|pages=19A|access-date=9 February 2010}}{{cite web|url=http://www.keyshistory.org/nokeylargopage2.html|title=North Key Largo|last=Wilkinson|first=Jerry|work=Keys Historeum|publisher=Historical Preservation Society of the Upper Keys|access-date=9 February 2010}} The park is an important habitat for the threatened Key Largo Woodrat and the Key Largo Cotton Mouse, which are found only in this part of Key Largo: 90% of these animals' habitat is in the Dagny Johnson Park and the adjacent Crocodile Lake National Wildlife Refuge.{{cite journal|title=Movements and habitat use of the Key Largo woodrat|author=McCleery, R.A.|author2=Lopez, R.R.|author3=Silvy, N.J.|name-list-style=amp|year=2006|journal=Southeastern Naturalist|volume=5|issue=4|pages=725–736|jstor=3878061|doi=10.1656/1528-7092(2006)5[725:MAHUOT]2.0.CO;2}}