Javanese language - Demographic distribution of Javanese speakers

A graph showing the number of native speakers in 1980, for the 22 Indonesian provinces (from the total of 27) in which more than 1% of the population spoke Javanese:

Reference 1: % of provincial population and Javanese speakers (1980).

Reference 2: Aceh province, North Sumatra, West Sumatra, Jambi, South Sumatra, Bengkulu, Lampung, Riau, Jakarta, West Java[26], Central Java, Yogyakarta, East Java, Bali, West Kalimantan, Central Kalimantan, South Kalimantan, East Kalimantan, North Sulawesi, Central Sulawesi, Southeast Sulawesi and Maluku.

Source: http://en.wikipedia.org/wiki/Javanese_language