Sir Russell John Dumas KBE, CMG (17 January 1887 – 10 August 1975) was a public servant and engineer who led several large works projects in Western Australia.

[2] In 1925, Dumas and his family moved to Western Australia where he joined the Metropolitan Water Supply, Sewerage and Drainage Department.

[2] In 1934, Dumas became chief engineer at the Metropolitan Water Supply, Sewerage and Drainage Department and led the design and construction of the Canning, Samson Brook and Stirling dams.

[2] He proposed a water supply scheme for the Wheatbelt region that involved raising Mundaring Weir and Wellington Dam.

[2] In the 1960s, Dumas took part in the campaign to save The Barracks Arch, the former home of the Public Works Department, from demolition.