Campbellford is an unincorporated place and former town in Northumberland County, in the township municipality of Trent Hills. Campbellford is surrounded by prime agricultural land which is home to many farms. In recent years, some of the town's agricultural sector has diversified into non-traditional areas such as bison farming and rare breeds farming, and there are many horse farms in the area. Campbellford traces its history back to 1834, when the first homesteaders arrived in the area. Once very wealthy, it is still known today for its many fine Victorian homes.