Donald MacMillan (rugby union)

Donald MacMillan (born 1885, died 1962) was a Scottish rugby union player. He played as a forward.

MacMillan was capped eight times for Scotland between 1906 and 1912. He played club rugby for Cambridge University and London Scottish FC. He was also part of the British Isles team that toured South Africa in 1910. He is notable for being a strong and committed player in the forward pack. After his playing career, he remained involved in rugby as an administrator.