Major General Walter Adams Coxen CB, CMG, DSO (22 June 1870 – 15 December 1949) was a senior Australian Army officer in the First World War.

In July 1902 he succeeded Major William Bridges as Chief Instructor at the School of Gunnery at Middle Head.

Coxen served briefly with the coast artillery at Fort Queenscliff before becoming Inspector of Ordnance and Ammunition at Army Headquarters in Melbourne.

The brigade was to consist of two batteries, with eight siege guns to be supplied by Britain and 415 officers and other ranks, about half of whom would be permanent force artillery gunners.

The brigade, which became known as the 36th Heavy Artillery Group (36 HAG), departed Melbourne on 17 July 1915 and landed in England on 25 August 1915.

[2] On 18 January 1917, Coxen replaced Brigadier General Talbot Hobbs as commander of the 1st Division Artillery.

Coxen died at the Repatriation General Hospital, Heidelberg on 15 December 1949 and was cremated with full military honours.