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.

[1] This project, a joint project of the University of Toronto and the National Museum of Canada, was largely a salvage operation to conserve the artifacts left behind from many cultures of people including remnants of a village believed to date back 3500 years.

[1] The University of Toronto petitioned for an injunction against the Seaway project in order to continue the excavations however they were not successful.

[1] Some of the cultures who were found to have inhabited the island were multi-component-Middle Archaic, Laurentian, Archaic, Meadowood, Point Peninsula, Pickering, and the St. Lawrence Iroquois.