Cayuga was incorporated as a village in 1859 and became the county seat for Haldimand County because of its central location. It is named after the
Cayuga, one of the
Six Nations of the Grand River Natives who were awarded land in the area for siding with the
British in the
American Revolution. As the county seat, it is the location of the Court House, jail and a museum. In the late 18th century and early 19th century, public hangings were held in the courtyard and the prisoners buried on site. The
Highway 3 bridge over the Grand River (Cayuga Bridge) was a very well recognized bridge over the Grand River and was commonly used as a symbol of Haldimand County and the Grand River. For example, the same bridge had been used in a movie that commemorated Terry Fox. That bridge no longer remains a symbol of the Grand River and Haldimand County as it was replaced in the summer of 2014 with a concrete bridge. The village's population grew to about 2,500 in the mid-19th century because the Grand River was an important commercial route. There were locks constructed at Indiana just north of Cayuga. However, when the
Welland Canal was completed, the Grand became an obsolete route. Further, an impassable dam was built downriver from Cayuga at
Dunnville. Although originally part of the
Welland Canal, the purpose of the dam and a canal at
Port Maitland is to keep the level of the Welland Canal consistent. Presently the population of Cayuga has recovered to approximately 1,500 after having been around 1,000 for almost a century. In 1974, Cayuga was amalgamated with the villages of Hagersville and Caledonia and the townships of Oneida, Seneca, North Cayuga, South Cayuga, parts of Rainham and Walpole to form the town of Haldimand. Despite nearby Caledonia being the largest community in the town, the town hall was located in Cayuga because of its central location. In 2001, Haldimand, Dunnville and half of Nanticoke were consolidated into a larger Haldimand. Cayuga is now an unincorporated community in Ward 2 of Haldimand County. ==Climate==