Madretsch (formerly Mardrez) is a former commune in the Swiss canton of Bern. It is a suburb of Biel/Bienne, which it joined in 1920.
Previously a rural suburb with some remaining farms and green areas, it has now become fully integrated as a city suburb, without any real local character any more.
Local schools are taught in both German and French.
See also
http://commons.wikimedia.org/wiki/File:Karte_Biel_Quartiere_Madretsch_Süd.png