casterton postcode vicbr Home ›› Postcode Finder ›› VICBR ›› Casterton Casterton local listingsThe suburb of Casterton is located in VIC and has a postcode of 3311. Free casterton business listing! 1Casterton Secondary College27-29 Mount Gambier Rd 03 558115882Sacred Heart School39 Robertson St 03 558111313Casterton Primary SchoolMcPherson St 03 55811522 View more business listings in casterton Search and find other Postcodes in Victoria or widen the search to Postcodes in Australia.