Suffolk County 250th Anniversary of the Signing of the Declaration of Independence main graphic

Celebrate Suffolk County’s Role in America’s 250th Anniversary!

Join us in commemorating the 250th anniversary of the signing of the Declaration of Independence with a year-long series of events across Suffolk County! As one of the most historic regions in New York, Suffolk County played a pivotal role in the American Revolution. From colonial-era homesteads to battlefield sites, our rich history comes to life through reenactments, lectures, tours, festivals, and family-friendly activities.

Long before the Revolution, this land was home to the Indigenous peoples of the region, including Shinnecock, Montaukett, and Unkechaug Nations, who played a vital role in shaping the history of Long Island. We have many opportunities to delve into the intriguing ways that European settlers and Indigenous peoples contributed to our unique story in profound ways.

Explore our 250th Anniversary Event Calendar to discover the many ways you can engage with history. Visit our historic sites, where you can walk in the footsteps of our ancestors and experience the spirit of 1776 firsthand. Whether you’re a lifelong resident or a first-time visitor, this is a once-in-a-lifetime opportunity to connect with the past and celebrate the legacy of American independence right here in Suffolk County.

Check back often as new events are added and be sure to follow along as we honor our shared history. Plan your visits today and be part of this unforgettable milestone!

Calling All Suffolk County Communities: Join Us in Honoring America’s 250th!

In 2026, our nation will commemorate the 250th anniversary of the signing of the Declaration of Independence — and Suffolk County is proud to be part of this once-in-a-generation celebration.

We invite every town, village, hamlet, historical society, civic group, school, library, and neighborhood organization across Suffolk County to take part in the planning and celebration. Whether through parades, public art, festivals, lectures, reenactments, storytelling, or community service projects, we want every corner of our county to reflect the spirit of 1776 and showcase our diverse contributions to the American story.

Apply to register your planning group or organization and receive an official “Suffolk250-Designated Community” certificate from the Suffolk County Executive.

  1. Designate one individual as the primary contact for the application.
  2. Fill out the Suffolk250 Community application.
  3. Once your application is approved, your group will appear on the Suffolk250.org website, and you will have access to the Suffolk250 Coordinating Committee, meetings and the online toolkit.

Let’s come together to honor our past, celebrate the present, and shape a more perfect future.

Event date: 9/6/2025 10:00 AM - 4:00 PM Export event
Aimee Chabon
/ Categories: Suffolk 250 Events

Culper Spy Day

Civil War Soldiers dress in red military uniform

Culper Spy Day

Start Date: Sep-06-2025 

End Date: Sep-06-2025 

Time(s): Saturday, September 6th from 10:00 am - 4:00 pm Located at Three Village Historical Society & Museum and at partner sites throughout Setauket & Stony Brook

Sponsoring Org: Three Village Historical Society & Museum

Address: 93 N COUNTRY RD EAST SETAUKET 11733

Phone: 631-751-3730

Website: View

Culper Spy Day is a highlight for history enthusiasts, drawing the community together from Manhattan to The Hamptons to celebrate our Revolutionary War heritage. The Three Village area, steeped in hidden intrigue, played a crucial role in America’s fight for independence. It was here that the nation’s first spy ring operated in secrecy, providing General George Washington with critical information that helped turn the tide of the American Revolution. On Culper Spy Day, immerse yourself in the rich history of this pivotal era. Explore the very sites where these covert operations took place and engage with local groups dedicated to preserving the memory of the brave patriots who risked everything for their country. This event is a collaborative effort among local historical and cultural organizations, each contributing unique events and activities that bring the story of the Culper Spy Ring to life. Don’t miss this extraordinary opportunity to delve into America's Revolutionary past and honor the legacy of the heroes who shaped our nation. Join us for a day of education, exploration, and celebration at Culper Spy Day!

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