Jakarta administration and City Council have agreed to limit the population of the capital to no more than 12.5 million in the next 20 years, stating the target in the city’s 2010-2030 Spatial Planning Bylaw. The bylaw is putting population caps for each municipality and regency in proportion to the respective area’s width and function designation.

Central Jakarta’s population is expected to be no more than 1.15 million, North Jakarta 2.325 million, West Jakarta 3.162 million, South Jakarta 2.825, East Jakarta 3.012 million and Thousand Islands Regency 25,000 people.

http://www.thejakartapost.com/news/2011/08/26/city-limit-population-125-million-2030.html