Fort Stamford is a 5-acre historic site established during the American Revolution as a strategic fortification to protect the Stamford-Greenwich area from attack by the British forces. The fort was listed on the National Register of Historic Places in 1975, and some of the mounds from the original structure and markers commemorating the fort can still be seen today.

During the Revolutionary War, Fort Stamford was built as part of a ring of forts (others at New Castle, New York and White Plains, New York) by George Washington[7] to aid in the defense of Connecticut from loyalist raids. The fort in its current form was designed by the engineer who constructed West Point, Rufus Putnam. General David Waterbury oversaw the construction in 1781.[8] At its peak, the fort was home to 800 soldiers.

Some form of military camp or fortification existed at the site prior to the construction of the current fort. During the February 26, 1779 raid on Greenwich by William Tryon, General Israel Putnam rode to Fort Stamford to rally reinforcements. Tryon crossed the Mianus Bridge on the old Bedford Road (current day Mianus Road/Valley Road), but quickly retreated after seeing the size of the Fort's garrison. Troops from the fort then met Tryon in battle near Palmer's Hill and the Mianus River. A planned flank attack down what is now Westover Road from the Fort never materialized due to misunderstanding of the commanding officer's orders.

On July 2, 1779 during Banastre Tarleton's raid on Pound Ridge, New York, the 2nd Regiment of Light Horse under Colonel Sheldon prevented the fort from being directly attacked.

Later in the war, roughly 300 men manned the fort. When the war ended, the fort was considered no longer necessary, and was promptly sold. In later years, residents of the neighborhood began referring to Fort Stamford as "Fort Nonsense."