Category winners from year 1 to year 8 received smaller framed prints of their work.
Organiser Steve Hornby said he thought the standard was higher this year.
He said the judges told him they could see who had been taught photography at school.
"They could see the elements coming through."
Masterton mayor Lyn Patterson attended the evening and congratulated Alexa on her work.WINNERS:
Supreme winner: Alexa Wishart, Douglas Park
Y1/2 Living: Paris Rankin-Lintern, Lakeview
Y1/2 Non-living: Caitlyn de Lara-bell, Solway
Y3/4 Living: Alexa Wishart, Douglas Park
Y3/4 Non-living: Charlie Ferguson, Douglas Park
Y5/6 Living: Keisha Richdale, Solway
Y5/6 Non-living: James Crawley, Fernridge and Edith Dickson, Douglas Park
Y7/8 Living: Abby Cheetham, Opaki
Y7/8 Non-living: Zara Le Grove, Whareama.