On April 22nd, 2023, the Post Cemetery at Fort Ontario State Historic Site underwent a large and much needed cleanup. Several headstones in the cemetery were also straightened. The post cemetery is located on the shore of Lake Ontario in Oswego, NY, under a grove of trees. The windswept bluff overlooking Lake Ontario and is subject to extremely high winds and frost heaving which twists and turn the headstones. The high winds also cause debris and a lot off brush to cover the grounds around the headstones. Friends and staff of Fort Ontario as well as 25 local volunteers turned out to help clean and clear the cemetery, including Boy Scout Troop 780 from Hannibal, NY.

The Fort Ontario Post Cemetery is the resting place of seventy-seven British and American soldiers as well as women and children of soldiers from 1759 to 1943. The post cemetery was relocated to its current site in 1905 - 1906 when the fort was reactivated from a Company, to a Battalion sized post. The cemetery was in the way of construction and in 1904, the chief engineer received permission by Washington D.C. to have the remains relocated. When the post was deactivated in 1946, a War Department Order from the 1880's decreed that the remains of those interred at the to be abandoned post were to be disinterred and relocated, some for a third time, to Woodlawn National Cemetery in Elmira, NY. Ultimately a bill was signed into law in July 1947 by President Harry S. Truman preserving many old abandoned military cemeteries and the Fort Ontario Post Cemetery as a historic shrine.