Wach (surname)
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Wach is a Polish and German surname. Notable people with the surname include:
- Aloys Wach (1892–1940), Austrian expressionist painter and graphic artist
 - Andrzej Wach, Polish administrator, President of Polskie Koleje Państwowe S.A. (Polish State Railways)
 - Monsignor Gilles Wach (born 1956), French Roman Catholic priest and co-founder and prior general of the traditionalist Institute of Christ the King Sovereign Priest
 - Joachim Wach (1898–1955), German scholar of religion and sociologist
 - Karl Wilhelm Wach (1787–1845), German painter
 - Mariusz Wach (born 1979), Polish boxer
 - Ryszard Wach (born 1946), Polish modern pentathlete