Migliavacca () is an Italian surname, originally a corruption of Magnavacca ('cow-eater'). Notable people with the surname include:

Enrico Migliavacca (1901–1979), Italian association footballer and manager Giovanni Ambrogio Migliavacca (1718–1795), Italian poet and librettist Giuseppe Antonio Migliavacca (1849–1909), known as Arsenio da Trigolo, Italian Roman Catholic priest Innocenzo Migliavacca (1635–1714), Italian Roman Catholic prelate Maurizio Migliavacca (born 1951), Italian politician

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