Source : ( Library of Congress)

Ethnic Groups: In 1989 census, Armenians 93.7 percent, Azerbaijanis 2.6 percent, Kurds 1.7 percent, Russians 1.6 percent, and other 0.4 percent.

In Armenia, almost all Azeris and Kurdis are Muslim. So, we can conclude that , the total percentage of Muslim in Armenia is around 4%.