Пета армия
Active	1913 1941-1945
Country	Bulgaria
Allegiance	Bulgarian Army
Type	Field Army
Engagements	Second Balkan War World War II
Commanders
Notable commanders	Stefan Toshev Nikola Mikhov

The Bulgarian Fifth Army was a Bulgarian field army during the Second Balkan War and World War II.

The Fifth Army was formed in May 1913 under the name of the First Reserve Army, comprising two infantry divisions, the 12th and 13th. Each had 1 artillery brigade, seven infantry regiments, one cavalry brigade, and three border companies.^[1] Its commander was Major General Stefan Toshev.
On May 26, the 4th Preslav Infantry Division was included in the Fifth Army in place of the 13th Division.

The Fifth Army fought against the Serbs in Osogovo. It was disbanded on August 22, 1913