Bongolava is a region in central-western Madagascar. The capital of the region is Tsiroanomandidy. It had a population of 674,474 in 2018. T…Bongolava is a region in central-western Madagascar. The capital of the region is Tsiroanomandidy. It had a population of 674,474 in 2018. The region is situated in central-western Madagascar. It is bordered by Betsiboka, Melaky, Menabe, Vakinankaratra, Itasy and Analamanga. The altitude ranges from 800 m to 1,500 m.