Home Postcode finder SA Collinsfield Collinsfield postcode SA Collinsfield is a locality in South Australia covered by postcode 5555. Postcode 5555 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Collinsfield business listing Be the first listing in Collinsfield Common questionsWhat is the postcode for Collinsfield?Collinsfield, SA has the postcode 5555.What state is Collinsfield in?Collinsfield is in South Australia (SA).Does postcode 5555 cover more than one suburb?Yes. Postcode 5555 covers 11 localities, so the postcode alone does not identify Collinsfield. Browse other postcodes in South Australia, or widen the search to every Australian postcode.