Reuben Eldridge Truax
Member of Parliament for Bruce South
In office 1913–1921
Preceded by	James J. Donnelly
Succeeded by	John Walter Findlay
Ontario MPP
In office 1908–1911
Preceded by	Robert Edwin Clapp
Succeeded by	John Anderson
In office 1894–1904
Preceded by	Hamilton Parke O'Connor
Succeeded by	Robert Edwin Clapp
Constituency	Bruce South
Member of Parliament for Bruce East
In office 1891–1892
Preceded by	Henry Cargill
Succeeded by	Henry Cargill
Personal details
Born	(1847-10-11)October 11, 1847 Montreal, Canada East
Died	April 3, 1935(1935-04-03) (aged 87)
Political party	Liberal
Spouse	Jessie Porteous ​ (m. 1870)​
Occupation	Businessman

Reuben Eldridge Truax (October 11, 1847 – April 3, 1935) was an Ontario businessman and political figure. He represented Bruce South in the Legislative Assembly of Ontario from 1894 to 1904 and from 1908 to 1911 and Bruce East in 1891 and Bruce South from 1913 to 1921 in the House of Commons of Canada as a Liberal member. Truax served four years as reeve and was mayor of Walkerton, Ontario in 1888 and 1889.

He was born in Montreal, Canada East in 1847 and educated in Walkerton, Ontario. In 1870, he married Jessie Porteous. He owned a sawmill, planing mill and sash and door factory. He was first elected to the House of Commons in 1891 but that election was declared invalid and Henry Cargill was elected by acclamation in the by-election which followed. Truax was an unsuccessful candidate for the federal seat in Bruce South in 1911 and 1921.

• Reuben Eldridge Truax – Parliament of Canada biography
• Ontario Legislative Assembly parliamentary history
• The Canadian parliamentary companion, 1897 JA Gemmill
• The History of the County of Bruce and of the minor municipalities therein ..., N Robertson (1906)
• A History of Ontario : its resources and development. Part II., A Fraser (1909)