St. Kilian, Roman Catholic church in Biebrich, Wiesbaden, Germany.

St. Kilian is a Roman Catholic church at Sankt-Kilian-Platz in Wiesbaden-Biebrich, built in 1937 to Martin Weber's design as an Ottonian-style hall church. It forms the eastern side of the Waldstrasse/Holsteinstrasse crossroads in the Waldstrassenviertel.

St. Kilian was built in 1937 to plans by Martin Weber as a single-nave hall church in the Ottonian style. It belongs to the Catholic parish of St. Peter and Paul. From 1984 to 2010 the church musician was Petra Morath-Pusinelli.

The interior space regularly hosts musical performances, particularly by the Mainz Bach Choir and accomplished organists. This use shows how the building functions as more than just a place of worship within the city's musical life.

St. Kilian stands at Sankt-Kilian-Platz, forming the east side of the Waldstraße/Holsteinstraße crossroads in the Waldstraßenviertel of Wiesbaden-Biebrich. The entrance faces this small square, so the church is reached on foot from the surrounding streets rather than by car. It belongs to the Catholic parish of St. Peter und Paul.

The organ was rebuilt in 1980 by Hugo Mayer company, yet still features pipes from the earlier 1960 Kemper instrument installed in the space. This combination of older and newer components reflects careful restoration choices made during renovation.