Pematangsiantar (sometimes written as Pematang Siantar, acronym PS or P. Siantar, colloquially just Siantar), and also known as the City of Pematangsiantar, is an independent city in North Sumatra Province of Indonesia, surrounded by, but not part of, the Simalungun Regency, making Pematangsiantar an enclave within Simalungun Regency. Pematangsiantar formerly had the status of a second-level district (daerah tingkat dua) and was the administrative centre of the surrounding Regency, but in 1986 it was elevated to Kota (City) and separated from the Regency.
Read more from Wikipedia
Its population was 229,525 in the 2005 Intermediate Census, 234,698 in the 2010 Census and 268,254 in the 2020 Census. The official estimate as of mid 2025 was 279,198 (comprising 138,049 males and 141,149 females), making it the second-largest city in the province after the provincial capital of Medan. In addition to the areas within the city limits, the neighbouring district (kecamatan) of Siantar immediately to the east and south is administratively a part of Simalungun Regency and contains the eastern suburbs of the city; it covers 73.99 km2 and had a population at the 2020 Census of 73,536, but this declined to 68,037 by mid 2025.
From the Wikipedia article Pematangsiantar, CC BY-SA 4.0.
Weather
Loading…
Forecast by Open-Meteo from national weather models. A forecast, not a measurement.
The past twelve months
Loading…
ERA5 reanalysis from Copernicus, via Open-Meteo. Modelled on a ~25 km grid, not measured at a station.
Air right now
Loading…
CAMS European and global air quality forecast, via Open-Meteo. Modelled on an 11–40 km grid; European AQI bands from the EEA.
Nearby on Wikipedia
Loading…
Articles with coordinates within 10 km, from English Wikipedia.
Towns around Pematangsiantar
- Pekan Bahapal21 km NE
- Tebingtinggi42 km N
- Pangururan57 km SW
- Kisaran61 km E
- Tongging61 km W
- Paropo62 km W
- Kabanjahe66 km W
- Berastagi67 km NW
Straight-line distance and compass bearing from the town centre.