About Caledonia;

Caledonia was once a small strip of land between Seneca and Oneida villages. The Grand River traveled through Caledonia dividing it into two sides, North and South. In 1834, Ranald McKinnon was hired by the Grand River Navigation company to build a dam in Seneca and a dam in Caledonia. Completed in 1840, the dams made water power available. Mills sprung up all over Seneca village, and five mills were built in Caledonia by 1850. One renamed Caledonia Mill is preserved but closed to visitors.

The Hamilton to Port Dover Plank Road was brought through Caledonia in 1838. A bridge was built across the river in Caledonia and Seneca in 1842. These wooden bridges lasted around 19 years before they were swept away by the ice on the river. The Seneca bridge was never rebuilt. As of 2008, the Grand River Bridge built in 1927 serves Caledonia's traffic.

In 1844, Caledonia was incorporated as a village and later as a town. By 1860, the Grand River Navigation company was bankrupt, and their land was sold to different organizations. Seneca village was failing; many people from Seneca moved to Caledonia. Navigation on the river ended by 1880. A whole new way of transportation arrived around 1883; the Grand Trunk Railway passed through Caledonia. Oneida had become part of Caledonia and the town limits were expanding. By 1960 Caledonia was a bustling town.

In 1974, the town was amalgamated into the new town of Haldimand within the Regional Municipality of Haldimand-Norfolk. Although the largest community in Haldimand, the town hall was located in nearby Cayuga. In 2001, Haldimand and all other municipalities within the region were dissolved and the region was instead divided into two single tier municipalities with city-status but called counties. Caledonia is now an unincorporated community in Ward 3 of Haldimand County.