How many time zones does Indonesia have?

Indonesia has 3 time zones.

None of them use daylight saving time, so the gaps between them stay the same all year.

UTC offset	Time now	Zone includes
UTC+7		Jakarta, Pontianak Java, Sumatra; Borneo (west, central)
UTC+8		Makassar Borneo (east, south), Sulawesi/Celebes, Bali, Nusa Tengarra, Timor (west)
UTC+9		Jayapura New Guinea (West Papua / Irian Jaya), Malukus/Moluccas

The count is based on standard (winter) time. The full list covers every country.