Home Postcode finder VIC Mcmahons Creek Mcmahons Creek postcode VIC Mcmahons Creek is a locality in Victoria covered by postcode 3799. Postcode 3799 State or territory Victoria (VIC) Region Ringwood Add a free Mcmahons Creek business listing Be the first listing in Mcmahons Creek Common questionsWhat is the postcode for Mcmahons Creek?Mcmahons Creek, VIC has the postcode 3799.What state is Mcmahons Creek in?Mcmahons Creek is in Victoria (VIC).Does postcode 3799 cover more than one suburb?Yes. Postcode 3799 covers 7 localities, so the postcode alone does not identify Mcmahons Creek. Browse other postcodes in Victoria, or widen the search to every Australian postcode.