The group, now performing as the foursome of Ally Brooke, Normani Kordei, Dinah Jane and Lauren Jauregui, will hold shows in Down Under, in support of their forthcoming self- titled third album, reported Billboard.
Their PSA Tour will start from Perth on October 24 and run through November 1.
The last show will be held at Brisbane Convention Centre.
"Aussie Harmonisers, we're so excited to be coming back to Australia on our PSA Tour. Our Australian fans have been there for us since day one, and we always have such a great time in Australia. (We) Can't wait to see you all dancing in October," Fifth Harmony's Kordei said in a statement.