Klvače is a village in Chvojnica Municipality, in Myjava District, in the Trenčín Region, Slovakia. Klvače lies at 502 m above sea level, 2.7 km from the White Carpathians mountains. The nearest city is Piešťany, 40 km to the southeast. Among the landmarks around are Čachtice Castle (27 km), Mikulčice-Valy (24 km) and Buchlov Castle (33 km). Among the natural features are Žalostiná (1.0 km) and Bučkova jama (1.7 km).
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