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! 1Redden Bros Pty Ltd15 OD 5 Road 08 8664 06602Jamestown Community School1 Humphris Terrace 08 866427003St James' School1 King Edward Terrace 08 86641120 View more business listings in jamestown Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.