Do Australia passport holders need a visa to visit JM?

Australian ordinary passport holders do NOT need a visa to visit Jamaica for tourism. You can enter visa-free; immigration officers typically grant a stay of up to 90 days (extendable). You must complete the free online C5 Immigration/Customs form before you travel. Australia is on Jamaica's visa-exempt list (as a Commonwealth country), so Australian ordinary passport holders may enter Jamaica for tourism, family visits, business meetings and similar short-stay purposes without a visa. The Jamaica Passport, Immigration and Citizenship Agency (PICA) confirms "No visa required" for Australian nationals. At the port of entry an immigration officer determines the authorized length of stay, commonly up to 90 days for tourists (and up to 6 months in some cases); extensions can be requested from PICA before your initial stay expires. There is no visa fee, but every incoming traveller (by air or sea) must complete the mandatory online C5 Immigration/Customs form before arrival via the official EnterJamaica platform. The C5 is free of charge; numerous lookalike third-party sites charge unnecessary fees, so use only the government site. You must hold a passport valid for at least six months beyond your departure from Jamaica, an onward/return ticket, proof of sufficient funds, and (if arriving from or transiting a yellow-fever-endemic country) a valid yellow fever vaccination certificate. This verdict was verified against PICA, the official EnterJamaica C5 platform, the Jamaica Information Service, and Australia's Smartraveller guidance.