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Just as the US Census takes stock of our human population every ten years, so too does New York City for its tree population. Since 1995, NYC Parks has conducted decadal counts of street trees (adding park trees in the most recent count), and it’s now time to get an update on our urban forest!
Trees Count 2025 is the fourth participatory inventory of NYC's urban trees. We will record the location, size, species, and condition of all public street and park trees in New York City.
How You Can Get Involved
We’re seeking New Yorkers to help us count all the trees in city parks across New York City! This opportunity only comes every 10 years, so don’t miss out on your chance to measure, count, and check up on our park trees to see how they’re doing.
We will provide all the necessary materials and training. No experience is necessary, just willingness to give your trees a nice, big hug!
What to Expect
When you attend one of our Trees Count events in a NYC Park, you will receive a tote bag with all the materials needed to count trees! Next, we'll provide a 20-minute training session that includes the basics of tree identification and how to measure and assess each tree.
Using our Tree Census app, you’ll split up into different zones within the park to start counting trees! You should expect to count trees for approximately one to two hours. After completing your first training event, you are welcome to continue counting trees on your own in smaller parks across the city.
Upcoming Trees Count Events
More events are added regularly, so please keep checking this page for updates!
| Name | Registration Dates | |
|---|---|---|
| 08/24: Trees Count at Walter Gladwin Park | 7/31/2025 - 8/22/2025 | Registration has ended. |
| 08/27: Trees Count at Van Cortlandt Park | 7/31/2025 - 8/25/2025 | |
| 09/04: Trees Count at Starlight Park | 8/14/2025 - 9/2/2025 | |
| 09/06: Trees Count at Richman (Echo) Park | 8/16/2025 - 9/4/2025 | |
| 09/07: Trees Count at Rev. T. Wendell Foster Park | 8/17/2025 - 9/5/2025 | |
| 09/15: Trees Count at Mosholu Parkway | 8/22/2025 - 9/12/2025 |
| Name | Registration Dates | |
|---|---|---|
| 08/25: Trees Count at Paerdegat Park | 7/31/2025 - 8/22/2025 | Registration has ended. |
| 08/29: Trees Count at McCarren Park | 8/5/2025 - 8/27/2025 | |
| 09/02: Trees Count at Saratoga Park | 8/12/2025 - 8/29/2025 | |
| 09/05: Trees Count at Cooper Park | 8/5/2025 - 9/2/2025 | |
| 09/09: Trees Count at Owl's Head Park | 8/19/2025 - 9/5/2025 | |
| 09/14: Trees Count at Brower Park | 8/24/2025 - 9/12/2025 | Registration begins 08/24/2025 at 08:00 am. |
| 10/4: City of Forest Day Trees Count at Prospect Park | 9/13/2025 - 10/1/2025 | Registration begins 09/13/2025 at 09:00 am. |
| Name | Registration Dates | |
|---|---|---|
| 09/03: Trees Count at Bryant Park | 8/5/2025 - 8/31/2025 | |
| 09/12: Trees Count at Sakura Park | 8/22/2025 - 9/10/2025 | |
| 09/13: Trees Count at Corlears Hook Park | 8/23/2025 - 9/11/2025 | |
| 09/13: Trees Count at St. Nicholas Park | 8/23/2025 - 9/11/2025 | |
| 09/14: Trees Count at Riverside Park | 8/24/2025 - 9/12/2025 | Registration begins 08/24/2025 at 08:00 am. |
| Name | Registration Dates | |
|---|---|---|
| 08/26: Trees Count at Roy Wilkins Park | 7/31/2025 - 8/22/2025 | Registration has ended. |
| 08/28: Trees Count at Bayswater Park | 7/31/2025 - 8/26/2025 | |
| 09/06: Trees Count at Travers Park | 8/24/2025 - 9/4/2025 | |
| 09/07: Trees Count at Hunter's Point South Park | 8/17/2025 - 9/5/2025 | |
| 09/08: Trees Count at Springfield Park | 8/18/2025 - 9/5/2025 | |
| 09/11: Trees Count at MacDonald Park | 8/21/2025 - 9/9/2025 |
| Name | Registration Dates | |
|---|---|---|
| 09/06: Trees Count at Westerleigh Park | 8/16/2025 - 9/4/2025 | |
| 10/4: City of Forest Day Trees Count at Conference House Park (T-Shirt Giveaway Event!) | 9/13/2025 - 10/1/2025 | Registration begins 09/13/2025 at 09:00 am. |
Why Do We Count Trees?
NYC Parks performs a comprehensive tree inventory every 10 years to understand our urban forest’s population characteristics and change over time. We use the data collected to develop new management and operational plans for all the trees across the city. The census also helps us identify areas where there is room for more trees so that we can expand our canopy equitably and increase the benefits that trees provide.
We also love to get New Yorkers involved because when people engage with their trees through the tree census, we build the next generation of tree stewards to understand, advocate, and care for the urban forest.
How the 2025 Census Works
Park Tree Census
We’re hosting tree census events to engage volunteers like you to help us count, measure, and identify every tree in every park across New York City.
We will provide on-site training and tree identification guides to make sure that our volunteers are confident to be as accurate as possible.
Street Tree Census
To count all of the street trees in New York City, Parks will be utilizing ground-based light detection and ranging (LiDAR) scans, captured on devices mounted on cars, to create three dimensional “digital twins” for each tree. These scans will be processed with machine learning algorithms to derive all sorts of important and cool metrics about our NYC street trees, including their size, species, condition, and location.
Get Involved
Large Groups
Bring your corporate group or large organization to Trees Count 2025! Find out how to get involved.
Tree Census History
Learn more about the tree census efforts from 1995, 2005, and 2015 and see the results from each one.
Presenting Sponsors
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