Ault Park is a park on the St. Lawrence River in the Township of South Stormont, near Long Sault, Ontario, Canada. Originally on Sheek's Island, the park was built on family property donated to the Township of Cornwall by Levi Addison Ault. Sheek's Island was submerged by the St. Lawrence Seaway project in 1958, and Ault Park was rebuilt on the new river shore.