Reformierte Kirche Bülach, Gothic church in Bülach, Switzerland.

The Reformierte Kirche Bülach is a single-nave late Gothic church with a polygonal choir and a tower attached to the choir's left side. The tower, built in 1508–1510 and reshaped in 1838–1839, rises 71 meters and carries a weather vane. The nave was enlarged to its present size in 1678, and a neo-Gothic redesign followed in 1870–1871.

The church emerged during medieval times and embodies a period of religious change in Canton Zurich connected to the 16th-century Reformation. It was later modified to align with Reformed Protestant worship practices.

The parish church keeps the Laurentiusrost, the gridiron of Saint Lawrence, in Bülach's coat of arms, and the Catholic Trinity Church honours him as second patron. The 1620 Renaissance pulpit was removed in 1968–1970 and is now held by the town's cultural archive. The choir windows by Hans Affeltranger, installed in 1970, show Creation in yellow, the Fall in red, Bethlehem in violet, the Passion in blue and Hope in green.

The church sits in central Bülach and is accessible during regular opening hours, with scheduled services held in German throughout the year. When planning to visit, it helps to check local service times since hours may shift seasonally.

The tower clock and striking mechanism were installed in 1901 and had to be wound by hand every day until 1970. It now takes its time signal from Frankfurt am Main, and in 2012 the purely mechanical original state of the movement was restored, kept accurate by a newly developed hand-synchronisation system.