castlemaine postcode vic Home ›› Postcode Finder ›› VIC ›› Castlemaine Castlemaine local listingsThe suburb of Castlemaine is located in VIC and has a postcode of 3450. Free castlemaine business listing! 1Castlemaine Secondary CollegeEtty St 03 547942222Castlemaine Secondary CollegeBlakeley Rd 03 547911113Castlemaine North Primary SchoolBarker St 03 54721391 View more business listings in castlemaine Search and find other Postcodes in Victoria or widen the search to Postcodes in Australia.