1909
The 1909 official census was undertaken by the authorities of the Principality of Montenegro. Ethnicity was decided according to the mother tongue and religion, the official language being the Serbian language:
Total: 317,856 inhabitants. By language:
- Serbian: ~95%
- others mostly Albanian
By religion:
- Orthodox Christians: 94.38%
- others (mostly Muslims)
Read more about this topic: Demographic History Of Montenegro