61 Free Activities in NYC September 2025 for Kids

Back-to-school season can be expensive, but we've found 61 free things to do in NYC with kids this September. Our picks for free things to do include the last few bites of summer fun at Little Italy's Feast of San Gennaro, the big Brooklyn Book Festival (with a special appearance by Mommy Poppins herself, Anna Fader!), and a Mommy Poppins-sponsored back-to-school bash at Pier 57.
Plus, Broadway is staging a free concert in celebration of NYC's 400th birthday!
Read on for the best free things to do in New York City this September with kids, including events in Brooklyn, Queens, and the Bronx. Find more top events on our always-packed Family Activity Calendar.
More Things To Do in NYC this September with Kids
- Best Things To Do in NYC this Week with Kids
- Top Things To Do in NYC this September
- NYC Kids' Guide to Fall Fun
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As always, if an event piques your interest, click through to our listing for all the details, including addresses and times. And keep in mind: Really cool things to do with kids often book quickly, so register or buy your tickets ASAP.
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Places featured in this article:
Bryant Park
Brooklyn Bridge Park]
Bryant Park Carousel
Van Cortlandt Park Parade Ground
Various Manhattan locations
The Six Foot Platform
Little Italy
Hudson Yards
Park Slope Open Streets
The Battery
Abolitionist Place
Randall's Island
Perelman Performing Arts Center
Robert F. Wagner, Jr. Park
Henry Street Settlement
Inwood Hill Park - Pat's Lawn
Brooklyn Bridge Park
Hudson Yards - Public Square and Gardens
5th Avenue
Brooklyn Bridge Park
LeFrak Center at Lakeside
Miller Theater at Columbia University
Andrew Haswell Green Park
Montague Street
Robert F. Wagner, Jr. Park
Brooklyn Made Store
JJ Byrne Playground
Brooklyn Commons Park
Esplanade Plaza
Sherman Creek Park
Hudson Yards
Fort Tryon Park
Hudson Yards - Public Square and Gardens
Pier 57 - Living Room
Emily Warren Roebling Plaza
Rockaway Beach
Herbert Von King Park
National Parks - Multiple Locations
Lincoln Center - Rubenstein Atrium