|Full name||Robert Gordon MacMillan|
|Date of birth||3 April 1865|
|Date of death||3 April 1936(aged 71)|
|Place of death||Cirencester, England|
|Rugby union career|
|Years||Club / team|
|West of Scotland F.C.
London Scottish F.C.
Edinburgh University RFC
|Years||Club / team||Caps||(points)|
Robert "Judy" Gordon MacMillan (3 April 1865 – 3 April 1936) was a Scottish international rugby union forward who played club rugby for Edinburgh University. MacMillan played international rugby for Scotland for over 11 seasons, and in 1891 he represented the British Isles team on their South Africa.