卢斯多夫（德语：Loosdorf）是奥地利下奥地利州梅尔克县的一个市镇。总面积11.91平方公里，总人口3619人，人口密度303.9人/平方公里（2005年）。

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Loosdorf is a little town in the district of Melk in the Austrian state of Lower Austria. One of its historical buildings is the Hohe Schule (translation: the high school), the first school in Central Europe with a written curriculum, founded in 1574 by the Austrian nobleman Hans Wilhelm von Losenstein (translated: "John William of Losenstein"), the lord of the nearby castle Schallaburg. It served as a Lutheran grammar school (gymnasium) from about 1574 until 1627.