In the Batavia area during the 1630s, the dominant religion among the local population was Islam , while the Dutch colonial center in Batavia was officially Dutch Reformed Christian and worked to expand Christianity there.

What that meant locally

Batavia was a colonial port city, so it was religiously mixed rather than uniform. The Dutch administration and missionaries were building churches and pushing Christian education, but the surrounding Javanese and broader Indonesian communities were already strongly influenced by Islam.

Simple breakdown

  • Dutch Batavia: Protestant Christian, especially Dutch Reformed.
  • Surrounding local area: Mostly Muslim, with some older local beliefs and smaller non-Muslim communities depending on the district.
  • Colonial policy: Christianity was promoted inside the Dutch settlement, but it did not replace Islam in the wider region during the 1630s.

Historical nuance

Batavia itself was a colonial city built on top of a Muslim-majority regional world, so the religious picture depended on which people you mean: Dutch officials, enslaved people, traders, or local Javanese residents. If you mean the area around Batavia , Islam was the main religion; if you mean the Dutch enclave inside Batavia , it was Protestant Christianity.

TL;DR: Around Dutch Batavia in the 1630s, the surrounding population was mostly Muslim , while the Dutch colonial center was Protestant Christian.