The Serbian Orthodox Church of St. Demetrius the Great Martyr in Jasenovo, Serbia is one of the oldest spiritual landmarks of the village and a key monument of Orthodox heritage in southern Banat. Dedicated to St. Demetrius (Sveti Dimitrije), one of the most revered warrior saints in Orthodox Christianity, the church reflects centuries of continuous religious life in the area.

According to church records and local tradition, the first wooden church was built in 1653 by early settlers. It served the Orthodox community for more than seven decades, before being replaced in 1726 by a larger stone church. This second church stood for nearly two centuries and played an important role in preserving faith and identity during periods of political and social change.

The present church building was constructed in 1912–1913 and consecrated in August 1913. Designed to accommodate around 600 worshippers, it features a traditional Orthodox layout, with a prominent iconostasis and interior furnishings crafted by regional masters. The icon painter Adam Čiplić and sculptor Julius (Jon) Bosiok contributed to the artistic decoration of the church.

During World War I, the church bells were removed by occupying forces, a fate shared by many churches in the region. New bells were acquired and installed in 1925, restoring the church’s liturgical soundscape. The oldest preserved parish registers date from 1794, providing valuable sources for local and genealogical research.

Today, the church remains the spiritual heart of the Orthodox community in Jasenovo. Its patronal feast, Mitrovdan (8 November), is celebrated annually and continues to be one of the most important religious and communal events in the village.