Moriches Bay
![](/Images/godic/202501/28/Moriches_Bay_NY1125.JPG")
![Map of Great South Bay. Moriches Bay is on the far right](/Images/godic/202501/28/Fire-island-map1125.jpg")
Moriches Bay (/mʊərˈɪtʃɪz/ mohr-ICH-iz) is a lagoon system on the south shore of Long Island, New York. The name Moriches comes from Meritces, a Native American who owned land on Moriches Neck.
Two townships in Suffolk, New York (Brookhaven and the Southampton) share its shoreline.