muswellbrook postcode nsw Home ›› Postcode Finder ›› NSW ›› Muswellbrook Muswellbrook local listingsThe suburb of Muswellbrook is located in NSW and has a postcode of 2333. Free muswellbrook business listing! 1Muswellbrook High School9-45 King St 02 654310332Dunmore Lang Christian Community College30 Sowerby St 02 654311143Muswellbrook Public School3-9 Roger St 02 65432289 View more business listings in muswellbrook Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.