Peconic

Peconic may refer to:


 * Peconic, New York, a hamlet in Suffolk County, New York
 * Peconic Bay, two bodies of water between the North Fork and the South Fork of Long Island, New York
 * Great Peconic Bay, the body of water between the North Fork and the South Fork of Long Island, New York
 * Little Peconic Bay
 * Peconic Bay Medical Center, in Riverhead, New York
 * Peconic County, New York, a proposed new county in New York
 * Peconic River, a tributary of Peconic Bay in Suffolk County, New York
 * USS Peconic (AOG-68), a United States Navy ship