Sadlier is a surname. Notable people with the surname include:
Anna T. Sadlier (1854-1932), Canadian writer, translator Clifford Sadlier (1892–1964), Australian Victoria Cross recipient Kieran Sadlier (born 1994), Irish footballer Mary Anne Sadlier (1820–1903), Irish writer Richard Sadlier (born 1979), Irish footballer Tom Sadlier (1890–1960), Australian rules footballer William Sadlier (bishop) (1867–1935), New Zealand Anglican bishop
See also Sadlier baronets, a title in the Baronetage of England William H. Sadlier, an American publishing company Sadliers Sadleir (disambiguation)