Nikolaos Kladas (Greek: Νικόλαος Κλαδάς) was a Hellenic Army officer who reached the rank of major general.

[1] Kladas was respected for his professional erudition, and wrote a number of studies on tactics, including the first Greek treatise on the use of the machine gun in the battlefield.

[1] As a royalist, he was dismissed in 1917–1920, but returned after the November 1920 elections, taking over command of the 11th Infantry Division in the Asia Minor Campaign.

During the Greek retreat in August 1922, he was cut off around Prousa by Turkish cavalry, and captured with his division while trying to reach Moudania.

Quick medical assistance saved his life, and he was released early, on account of his damaged health, in February 1923.