 Tiefenbronn's coat of arms displays a golden well with the bucket drawn up on green ground upon a field of blue.The well's usage as a symbol of the town dates to 1721, but was not made official until 1966, when the municipal pattern and tincture were decided with the advice of the .This coat of arms was approved by the Federal Ministry of the Interior on 30 March 1966 again on 15 February 1979 by the Enz district office after the merging of Lehningen and Mühlhausen into Tiefenbronn in 1972.