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!

Registration Required

Sign up here
Registering helps us track volunteer hours and ensure everyone has the right supplies. See you in the garden!

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.

Where to Meet

Just inside the Greenpoint Ave entrance.