Cutchogue (/ˈkʌtʃɒɡ/ KUTCH-og) is a hamlet and census-designated place (CDP) in Suffolk County, New York, United States, on the North Fork of Long Island's East End.

Many of the local Native Americans lived at Fort Corchaug before English-American settlers began arriving in 1640.

In fact, it is one of the best surviving examples of English domestic architecture in the United States, and it has been named a National Historic Landmark.

[8] An avid sailor, Albert Einstein once called Little Peconic Bay in Cutchogue "the most beautiful sailing ground I ever experienced.

[9] While in Cutchogue on August 2, 1939, pipe-smoking Einstein was visited by fellow Jewish physicists from Hungary Leó Szilárd (who had produced a nuclear chain reaction in a laboratory at Columbia University) and Edward Teller (both prompted by Niels Bohr), and dictated the famous Letter to President Roosevelt, alerting him to the new developments in nuclear physics and hinting that the Germans might be working on an atomic bomb, urging him to launch his own program.

[10] The letter is widely credited with setting in motion the Manhattan Project, the US government effort that built the first atomic bomb.

When Szilárd first explained the concept of a nuclear chain reaction to him, Einstein gave the famous reply, "Daran habe ich gar nicht gedacht!"