The 11th Air Defense Division (Serbo-Croatian: 11. divizija protivvazdušne odbrane/ 11. дивизија противваздушне одбране) was an air defense division established in 1964 1st Air Defense Zone (Serbo-Croatian: 1. zona protivvazdušne odbrane / 1. зона противваздушне одбране).

The 1st Air Defense Zone was formed in 1964, and it was reorganized into 11th Air Defense Division on July 25, 1966.

The divisions command was at Belgrade - Banjica.

Its task was aerial defense of eastern part of the airspace of Yugoslavia.

It was disbanded on February 28, 1986, when its command was reorganized into command of 1st Corps of Air Force and Air Defense.