John Guthrie Wood Aitken (6 February 1849 – 17 August 1921) was the Mayor of Wellington, New Zealand from 1900 to 1905.

[1] Aitken was born at Low Park Farm, Kilchenzie, Kintyre, Argyleshire, Scotland, on 6 February 1849 and educated at Campbeltown Grammar School.

In 1882 he became acquainted with George Wilson and entered into partnership with him as a general merchant in Wellington, New Zealand.

He was Chairman of the Wellington Education Board, and in 1917 was the first layman to be Moderator of the General Assembly of the Presbyterian Church of New Zealand.

[3] Aitken died at his home at 2 Levy Street, Wellington on 17 August 1921,[1] and he was buried at Karori Cemetery.