Caledonia Mill, Watermill and gristmill in Caledonia, Ontario, Canada.

Caledonia Mill was a timber-frame, water-powered gristmill on the banks of the Grand River in Caledonia, Ontario. It was the last mill of its kind on the river. In 2018 the structure was dismantled and rebuilt as an office complex.

The Caledonia Mill is thought to have been built around 1846, making it the last timber-frame, water-powered mill on the Grand River. In 1892, the Caledonia Milling Company Limited took over the site from Scott Brothers. The mill was dismantled in 2018 and rebuilt as an office complex.

The structure reflects how water-powered mills were central to early settlement patterns in the region, serving as gathering points where farmers brought their grain. The building itself demonstrates the craftsmanship and practical know-how of mid-1800s construction.

The mill stood on the bank of the Grand River in Caledonia, Ontario. In 2018 it was dismantled by Riverside Properties and rebuilt as an office complex, so there is no mill interior or machinery to tour; the structure is seen from outside as part of the present-day building.

The mill was the last timber-frame, water-powered mill on the Grand River in Ontario. In 2018 Riverside Properties dismantled it and rebuilt it as an office complex, so the structure visitors see today no longer stands in its original riverside setting.