Mackinley \m(a)-ckin-ley, mack(i)-nley\ as a boy's name is of Gaelic origin, and the meaning of Mackinley is "son of the white warrior; learned ruler". The tallest mountain in America is Mount McKinley. It is also known by its Athabaskan Indian name, Denali. American Vice-President William McKinley.

Mackinley has 3 variant forms: MacKinlay, McKinlay and McKinley.

Baby names that sound like Mackinley are MacNiel, MacNeill and MacNeal.