mermaid-beach postcode qld Home ›› Postcode Finder ›› QLD ›› Mermaid-Beach Mermaid Beach local listingsThe suburb of Mermaid Beach is located in QLD and has a postcode of 4218. Free mermaid beach business listing! Get the first free listing in mermaid beach! Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.