Home Postcode finder QLD Lakeside Lakeside postcode QLD Lakeside is a locality in Queensland covered by postcode 4621. Postcode 4621 State or territory Queensland (QLD) Region Sunshine Coast Add a free Lakeside business listing Be the first listing in Lakeside Common questionsWhat is the postcode for Lakeside?Lakeside, QLD has the postcode 4621.What state is Lakeside in?Lakeside is in Queensland (QLD).Does postcode 4621 cover more than one suburb?Yes. Postcode 4621 covers 11 localities, so the postcode alone does not identify Lakeside. Browse other postcodes in Queensland, or widen the search to every Australian postcode.