Mads Ellef Langaard (3 May 1815 – 23 March 1891) was a Norwegian brewery owner and industrialist.

In 1859, Langaard founded the brewery Frydenlund Bryggeri in Christiania together with three partners; Abraham Hesselberg, Justus Heinrich Schwensen and Knud Knudsen.

After some startup problems, the brewery became an economic success, and Langaard started other companies, and was involved in mining, forestry and shipping.

He established Follum Tresliperi in 1873 and Lillehammer Dampsag og Høvleri in 1876.

Mads Langaard died during 1891 and was buried on Vår Frelsers gravlund in Oslo.