Dalby Church, Medieval church building in Uppsala Municipality, Sweden.

Dalby Church stands on a peninsula in Lake Ekoln south of Uppsala. It has a rectangular nave with a narrower brick chancel to the east and a sacristy attached to the north; the whitewashed walls are natural stone. The roof is slate in white and grey laid in a zigzag pattern, and two brick ridge turrets with copper-clad spires rise from the ridge. The main entrance is in the south wall, where a medieval chancel portal survives.

The oldest parts date from the 13th century, when a church with a chancel narrower than the nave was built; its north and south nave walls survive west of the sacristy. During the Folkunga period (1250–1350) the church was extended south and east, a new chancel of nave width was raised, and the sacristy built with a runestone in its wall. In 1659 Baron Knut Jöransson Posse of Hammarskog had the present star-vaulted chancel built as a burial chapel for his family, with a chamber beneath the floor. In 1845 the nave was shortened and the present west gable built; the 1901–1902 restoration gave the church its slate roof and two ridge turrets.

The parish takes its name from Dalby, on a peninsula in Lake Ekoln. Inside, the medieval sandstone font from around 1200 is the church's oldest item; a hexagonal oak font donated by Knut Jöransson Posse in 1659 replaced it until 1902. The 14th-century triumphal crucifix on the south wall is attributed to the Dalbymästaren.

The site combines the church building with a cemetery and serves the local parish community. Visitors should note this is an active place of worship where respectful behavior is expected when exploring the grounds.

A runestone is built into one wall of the sacristy, north of the chancel. The medieval chancel portal is preserved in the south wall, and the church stands on a headland in Lake Ekoln, south of Uppsala.