Blackfordby is a village in the civil parish of Ashby-de-la-Zouch, in the North West Leicestershire district, in the northwesternmost corner of Leicestershire, England. It is about 2 miles (3.2 km) to the northwest of Ashby-de-la-Zouch and 2 miles (3.2 km) southeast of Swadlincote. On some early maps, such as one dated 1587, the village is shown as "Blaugherby", hence the local name of "Blofferby". The village is dominated by the Church of St Margaret of Antioch, Blackfordby, erected in 1858 on the site of an earlier Anglican Chapel which was attached to the St Helen's Church, Ashby-de-la-Zouch. The church stands in an elevated position next to the village school, and is built in the early English style. The church has a nave and chancel, with a tower surmounted by a broach spire and, for the greater part of the work, constructed from local sandstone which has become blackened due to the effects of air pollution.