On the eastern side of Solo lies Solo River (Bengawan Solo).
Its built-up (or metro) area made of Surakarta Municipality and 59 districts spread on 7 regencies was home to 3,649,254 inhabitants as of 2010 census.
Karanganyar and Boyolali regencies in the north, Karanganyar and Sukoharjo regencies in the east and west, and Sukoharjo regency in the south surround the 44.04 km2 city. After Bandung and Malang, this city is the third most populous in the southern section of the island of Java. A river that runs across the city's east side is memorialized in one of the keroncong songs, Bengawan Solo. Surakarta, along with Yogyakarta, is the heir to the Islamic Mataram Kingdom, which was partitioned in 1755 by the Giyanti Agreement.
- (in Indonesian) Badan Pusat Statistik: Luas Daerah menurut Kabupaten/Kota di Provinsi Jawa Tengah Tahun 2009 Archived August 18, 2011, at the Wayback Machine
- "Indonesia: Java (Regencies, Cities and Districts) - Population Statistics in Maps and Charts". www.citypopulation.de.