Unterbach may refer to:
Düsseldorf-Unterbach, an urban borough of the German city of Düsseldorf Lake Unterbach, a former excavator lake in Düsseldorf Unterbach Air Base, a military air base in Switzerland Unterbach, Meiringen, a settlement in the Swiss canton of Bern Unterbach, St. Martin in Passeier, a hamlet in the Italian province of South Tyrol
Also Unterbäch, a municipality in the district of Raron in the canton of Valais in Switzerland