leichhardt postcode qld Home ›› Postcode Finder ›› QLD ›› Leichhardt Leichhardt local listingsThe suburb of Leichhardt is located in QLD and has a postcode of 4305. Free leichhardt business listing! 1Immaculate Heart Primary School24 Old Toowoomba Rd 07 381210772Leichhardt State School72 Samford Rd 07 38133222 View more business listings in leichhardt Search and find other Postcodes in Queensland or widen the search to Postcodes in Australia.