McNeilly is a surname of Gaelic origin. Notable people with this surname include:
A. J. W. McNeilly (1845–1911), Irish politician Andrew McNeilly (born 1972), Trinidad and Tobago Bobsledder Donnell McNeilly (born 2005), British footballer Gerry McNeilly, Canadian lawyer Gord McNeilly, Canadian politician Greg McNeilly, American political consultant Liam McNeilly (born 2006), British racing driver Mac McNeilly (born 1960), American rock musician Mildred Masterson McNeilly (1910–1997), American writer Robert McNeilly (born 1951), American police chief Stephen McNeilly (born 1968), British writer
See also McNeilly station McNeill (surname)