Australia Day hats, shirts, skirts and shimmies were worn at the beach on Sunday.
Youngsters sported patriotic colours on their cheeks amid the revelry.
Wayne Partridge wore a drover's hat with an Australia Day badge on it and was clad in a white shirt emblazoned with the national flag.
More sombrely, Mayor Leon Stephens turned out in suit-and-tie with the chains of office around his neck.
It was great simply to walk around the frolicking foreshore under the southern sun. With the national holiday causing controversy because of its date, Port Pirie was honoured to have Adnyamathanha community member Vicky Welgraven as Australia Day Ambassador.
Ms Welgraven attended school in Port Augusta and has worked in the public service for 26 years including a stint with Deputy Mayor Cr Alan Zubrinich. She spoke eloquently during the official ceremony beside a shelter on the foreshore.
The Port Pirie Australia Day Committee awarded life membership to Lance Leak OAM and Barry Warner who were cheered by the crowd.
:A parade of youngsters came forward to accept prizes for the beach games.