Karl Rudolf Walden (1 December 1878 in Helsinki – 25 October 1946) was a Finnish industrialist and a military leader.
Walden was then promoted to commander in chief of the Finnish army and the Civil Guard (27 November 1918 - 30 December 1918).
He moved to Saint Petersburg, the capital of the Russian Empire, and after few years founded a sales agency for Finnish paper.
As a steadfast patriot, Walden also became a prominent figure in the large Finnish community of Saint Petersburg.
In the so-called Betrothal of January 1940, Finland's industry associations acknowledged the trade unions as negotiation partners regarding labour issues.
In 1928, Walden received the Danish Grand Cross of the Order of the Dannebrog personally from King Christian X.