Klosterkirche Uetersen, Baroque monastery church in Uetersen, Germany.

The Klosterkirche Uetersen is a baroque church in Schleswig-Holstein with a rectangular layout, large arched windows, and an integrated tower on its eastern end. The interior features an impressive ceiling fresco and ornate baroque details that run throughout the entire building.

The monastery was founded in 1234 as a Cistercian convent for women and underwent major change during the 16th-century Reformation. After 1555 it continued operating as a Lutheran women's foundation, serving the region for centuries to come.

The name Klosterkirche recalls the former Cistercian convent, though the church was built in 1747–1749, after the foundation had become a noble ladies' convent. The altar relief of the Last Supper, donated by Captain Georg Wibers in 1691, came from the earlier church, while its frame dates from 1749. The pulpit is built into the altar, and the organ sits above it.

The church stands within the grounds of the Kloster Uetersen, an aristocratic women's foundation, and is reached from the town centre. The old main portal is on the north side, under a sandstone relief with the monogram F5 for King Frederick V of Denmark. The tower sits unusually on the east side behind the choir, so the entrance front is not the tower end.

The bell displayed in the church is not cast iron and not from 1742: it hung in the old monastery church built around 1239/40, which was demolished in 1738 because it had become dilapidated. Its foundation wall survives as a retaining wall of the monastery cemetery. The present church was built in 1748–1749 by Jasper Carstens of Jersbek and the Copenhagen state architect O. J. Müller.