Inaugural festival artist Trudi Pollard won the $5000 Stockland Sculpture Award for her work Indigo Scrolls.
The other winners were Eva Fernandez, who won the $5000 Gerry Gauntlett Award for Platero y Yo, and Eric Hynynen won the $5000 MRA Acquisitive Award for Lost.
Sharleen King won the $1000 highly commended award for Silent Departure and Kerrie Di Cataldo won the $1000 local artist award for Portscape.
The event was professionally curated by Robert Buratti.
The high-profile judges, including Art Gallery of WA director Stephano Carboni, UWA senior lecturer Darren Jorgensen and internationally renowned artist Ben Juniper, were impressed by the calibre of works presented and the number of local artists.
The 17-day festival was also officially opened by Culture and Arts Minister John Day.
Armadale Mayor Henry Zelones said it was the first time the City had opened up the competition nationally and he called on artists from all over Australia to become part of the vibrant local arts community.
The Minnawarra Art Awards exhibition is open every day from 11am to 4pm until Sunday, May 17.