monash postcode sa Home ›› Postcode Finder ›› SA ›› Monash Monash local listingsThe suburb of Monash is located in SA and has a postcode of 5342. Free monash business listing! 1Monash Primary School22 Jackson St 08 85835361 View more business listings in monash Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.