The concept of the Peconic Institute began in November 2010 with a group of like-minded individuals who believed that a sustainability institute was vital to the Peconic region of Long Island, New York. Many individuals had considered the idea of creating such an institute and were brought together as a result of the unexpected closing of the Stony Brook Southampton Campus earlier in 2010.

Students of the Stony Brook Southampton Sustainability and School of Marine & Atmospheric Sciences (SoMAS) advocated for the institute and encouraged that the Stony Brook Southampton Campus be made its home. Senator Kenneth P. LaValle and Assemblyman Fred W. Thiele agreed and organized a public scoping meeting on November 30, 2011. Over 175 stakeholders representing 50 organizations participated in formal discussions to create such an institute. Individuals, organizations, and elected officials volunteered their time to bring the Peconic Institute to life.

On April 16, 2012, Peconic Institute is as a not-for-profit corporation. Our organization is approved from the Internal Revenue Service as a not-for-profit 501 c 3. A tentative agreement with Stony Brook University to house the Institute is currently being finalized. We expect our home to be located in the LEED Certified Library of the Stony Brook Southampton Campus. Our first office was located in Bridgehampton, New York thanks to a generous donation of space by Group For The East End.