Charles Edward de la Barca Macmillan (December 1872 – 9 January 1941) was a New Zealand politician.

Macmillan was born in Saint Croix in the Danish West Indies in December 1872.

[2] They were part of the George Vesey Stewart Special Settlement to Te Puke, however his father wanted to be closer to the sea and thus bought land at Katikati.

[5] Standing for the Reform Party, he won the Tauranga electorate in the 1923 by-election[6] after the death of William Herries,[7] and held it to 1935[6] when he was defeated by the Labour candidate, Charles Burnett.

[8] He was subsequently granted the right to retain the title of "Honourable", having served more than three years as a member of the Executive Council.