jamestown postcode sa Home ›› Postcode Finder ›› SA ›› Jamestown Jamestown local listingsThe suburb of Jamestown is located in SA and has a postcode of 5491. Free jamestown business listing! 1Jamestown Community School1 Humphris Terrace 08 866427002St James' School1 King Edward Terrace 08 866411203Redden Bros Pty Ltd15 OD 5 Road 08 8664 0660 View more business listings in jamestown Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.