Agios Georgios Monastery, Arma, Eastern Orthodox monastery in Chalkideon Municipality, Greece.

Agios Georgios Monastery in Arma is a monastic sanctuary built on elevated terrain with thick stone walls and classic Greek Orthodox architectural features. It displays domed structures and bell towers typical of Eastern Orthodox places of worship.

The monastery was founded as a religious center in the Evia region and has functioned as a spiritual site through the centuries. Its protected archaeological status reflects its importance as part of Greece's religious heritage.

The monastery is dedicated to Saint George and belongs to the Metropolis of Chalkis, Istiaia and Northern Sporades. During the Ottoman period it served as a spiritual centre for the wider region. Since 1961 it has been counted as a settlement of the Fylla community; the 2011 census recorded three resident monks.

The monastery stands at 340 m altitude, about 16 km northeast of Chalkida, 10 km east of Fylla and 8 km north-northwest of Eretria, reached by road through pine and olive country. The buildings and grounds cover 2.5 stremmata, so the visit is short; the east wall inscription is on the outside and easy to miss from the entrance.

The founding date is uncertain: a walled inscription on the outer face of the east wall gives the year 7145 from the creation of the world, i.e. 1637, while the name Arma is often linked to the year 1141. The monastery was listed as a historic monument in 1921 and had three permanent monks at the 2011 census.