Do Australia passport holders need a visa to visit BD?

Yes, Australian ordinary passport holders need a visa for Bangladesh. The reliable route is a pre-arranged tourist (Machine Readable) visa from the Bangladesh High Commission in Canberra or the Consulate General in Sydney. There is no eVisa. A discretionary Visa on Arrival (USD 51, up to 30 days) exists for Australians but is not guaranteed, so applying in advance is strongly recommended. Australia has no visa-waiver arrangement with Bangladesh, so Australian tourists require a visa. Bangladesh issues Machine Readable Visas (MRV) as physical stickers; despite years of announcements, a fully electronic eVisa is still not in operation. Australians apply online via the visa.gov.bd MRV portal to fill the form, then submit the printed form plus passport and documents to the Consulate General of Bangladesh in Sydney (for NSW and Queensland residents) or the High Commission in Canberra (all other states and territories). A tourist visa typically requires a hotel booking or invitation letter, a return/onward air ticket, passport photos and a passport valid at least six months. The consulate advises applying at least three weeks before travel and not booking non-refundable arrangements until the visa is granted. Separately, Bangladesh offers a discretionary Visa on Arrival to Australians at airports for tourism, business or investment (single entry, maximum 30 days, USD 51 cash), but issuance is entirely at the discretion of the immigration officer and travellers must show an onward ticket, accommodation details and roughly USD 500 in funds. Because VoA is not guaranteed and some aggregator sites incorrectly report 90-day visa-free entry, the conservative and accurate verdict for a short tourist stay is visa-required: obtain the MRV tourist visa before departure.