Hammarby Church, Medieval church complex in Upplands Väsby Municipality, Sweden

Hammarby Church is a plastered grey stone church with steep shingled gable roofs, its nave running east-west with four cross-vaulted bays. A sacristy adjoins the north side and a porch the south; the gable facade has a small round window above a tall pointed-arch window. Lacking a bell tower, it has a wooden bell stack on a gravel ridge to the west.

The western part of the nave probably belonged to a smaller Romanesque church from around 1200. In the first half of the 14th century the church was extended eastward with the present choir and sacristy, and around 1400 the vaults were rebuilt and the south porch added. In 1678 the easternmost nave vault and the choir vault collapsed and were rebuilt the same year; the windows were enlarged in the 1770s.

The church is now used mainly for baptisms, weddings and funerals, while most parish services are held at Vilunda Church in Upplands Väsby Centrum. Inside, look for the 1696 pulpit carved by Andreas Heysig, bearing the de Geer family coat of arms, and the 1704 altarpiece attributed to Caspar Schröder.

The grounds are easily accessible on foot with open access to the exterior areas and cemetery. Inside, visitors can explore during designated times, with regular services and special occasions shaping when the building is available.

Hammarby Church has no bell tower: the bells hang in a wooden bell tower built in 1626 on a gravel ridge west of the church, clad in boards under a shingled roof with a spire and weather vane on top. The bells are rung by remote control.