Rachel McAdams, a Canadian actress.

John Loudon McAdam, a Scottish engineer noted for inventing the process of "macadamization" of roads.

McAdam, New Brunswick, a village in Canada.

John Macadam, an Australian (Scottish-born) chemist, medical teacher and politician, after whom the Macadamia nut is named

John McAdam, an American businessman

Sean McAdam, an American baseball writer.

Roberta McAdams, one of the first female Canadian politicians to sit in a legislature.

Colin McAdam, a Canadian novelist.

McAdam (also McAdams or MacAdam) is a surname with origins in the Ayrshire and Galloway regions of Scotland.