Hammill is a surname. Notable persons with that surname include:
Adam Hammill, English footballerCaleb Wild Hammill, one of the founders of the stockbrokerage and banking investment firm of Shearson, Hammill & Co.Ellen Hammill, writer of and actor in Joey (1986 film)Eric Hammill, farmer and former politician on Prince Edward IslandFrank Hammill, American politicianGerry Hammill, former member of Chocolate USAHenry Hammill Fowler, American lawyer and politicianJohn Hammill, governor of IowaJohn Hammill, first drummer of Pussy GalorePeter Hammill, English singer-songwriter and a founding member of Van der Graaf Generator