Tarmac Group Limited was a British building materials company headquartered in Wolverhampton, United Kingdom. It produced road surfacing and heavy building materials including aggregates, concrete, cement and lime, as well as operating as a road construction and maintenance subcontractor.

The company was founded in 1903 by Edgar Purnell Hooley after he patented the road surfacing material tarmac in 1901. The company was formerly listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index. In July 1999, Tarmac demerged its construction and professional services businesses under the name Carillion; the Tarmac building materials business was acquired by Anglo American later that year.

In 2010, the group was separated into Tarmac Limited and Tarmac Building Products. Anglo American merged Tarmac Limited with the United Kingdom assets of Lafarge in 2013 to form a 50:50 joint venture, Lafarge Tarmac (now Tarmac Holdings). Tarmac Building Products was subsequently sold to Lafarge Tarmac in 2014.