In the earliest surviving records, Jettenbach belonged to the parish of Reichenbach. At the time of the Protestant Reformation, it remained a filial chapelry after establishment of a Lutheran parish at Reichenbach in 1532. In late 1741, Jettenbach became a Lutheran parish in its own right though the parish register entries continued to be written into those of Reichenbach. From 1741, the neighbouring village of Kollweiler was affiliated to Jettenbach. From the Late Middle Ages, both villages had their own chapels in which clergy from Reichenbach held services. From 1746, Jettenbach's Reformed (Calvinist) believers were served from the newly established Reformed parish at Neunkirchen. In 1971, the two villages of Bosenbach and Niederstaufenbach merged into the Protestant parish of Jettenbach as filial chapelries after the old parish of Bosenbach was dissolved.