Immanuel Church, Protestant church building in Gambir district, Jakarta, Indonesia.

Immanuel Church is a Protestant place of worship in Gambir featuring a circular design with a dark brown dome and white facade supported by massive columns. A classical portico with imperial architectural style dominates the building's main entrance.

Construction began in 1834 to a design by J.H. Horst, and the first stone was laid on 24 August 1835. The church was completed exactly four years later, on 24 August 1839, and consecrated as Willemskerk in honour of King William I of the Netherlands. It is considered one of the first civic buildings on Koningsplein, later Merdeka Square.

The church is the only one in Jakarta that holds some services in Dutch, alongside Indonesian and English. Its name Willemskerk honoured King William I of the Netherlands. The 1843 Bätz organ, with 1,114 pipes and ivory keys, is played at every Sunday service.

The church sits at the intersection of Jalan Medan Merdeka Timur and Jalan Pejambon in central Jakarta. Entry requires respectful behavior during services, and the building is not open to visitors on Mondays.

Inside, the church holds a Dutch State Bible printed in 1748 and an original Bätz organ from 1843 that visitors rarely notice. These pieces reveal layers of European heritage embedded in the building's interior.