Several geographical locations within his home state of New York were named for him, including the colonial Fort Jay on Governors Island and John Jay Park in Manhattan which was designed in part by his great, great granddaughter Mary Rutherfurd Jay. Other places named for him include the towns of Jay in Maine, New York, and Vermont; Jay County, Indiana. Mount John Jay, also known as Boundary Peak 18, a summit on the border between Alaska and British Columbia, Canada, is also named for him, as is Jay Peak in northern Vermont.