Edwin Thoms (or Thomas) Cox (9 January 1881 – 18 December 1967) was a New Zealand politician and Mayor of Dunedin.

[2] His programme for Dunedin included work for the unemployed and for adequate housing for all citizens, although not all his proposals were accepted by the Council.

The opposition Citizens Association and the Otago Daily Times attacked him in a vitriolic campaign, with references to "municipal sovietism".

After losing the Mayoralty Cox unsuccessfully stood for the Labour nomination in the electorate of Dunedin West, but lost to Phil Connolly.

In 1967 Cox and his wife Winifred (who he had married in 1912) moved to Adelaide, where he died in December.