Archibald McDiarmid (December 8, 1881 – August 11, 1957) was a Canadian track and field athlete born in Balvicar, Scotland who competed in the 1920 Summer Olympics.

[1] In 1920 he finished fourth in the 56 pound weight throw competition and ninth in the hammer throw event.

[2] McDiarmid was the flag-bearer for Canada at the 1920 Olympics.

[3] He finished sixth in the 1930 British Empire Games hammer throw.

[1] This biographical article relating to Canadian athletics and track and field is a stub.