"It just brings everybody together, and gives us a bit of Christmas spirit and a bit of fun competition that's cheap and easy."
This year's winner was the Haskew family, whose mailbox was transformed into Frosty the Snowman.
Rachel Haskew said it took a few hours to decorate, and the materials included tinsel, a beach ball for the head, baling twine and the fabric put into duvets.
She said it was a fun activity for the family, with her 5-year-old son Taylor helping to put on the tinsel and the bows down Frosty's front.
Their nanny, Hannah Pratt, also helped with decorating.
Haskew said they had to figure out how to still have a working mailbox with all the decorating on it.
They were chuffed when they found out they were the winners.
"It was really neat and we were very excited to win.
"It's just about getting the community involved and the community spirit of Christmas."
The chief judge was local mailman Ian Dobson. He was the judge last year too, but this time got his family on board.
They took a family trip out one evening to do the judging, because some of the mailboxes had lights. There were about 30 to 40 mailboxes altogether.
Dobson said picking a winner was hard and there had been some attempts at emotional blackmail and bribery.
However, Frosty the Snowman was the winner because it was big, withstood the weather and the mailbox could still be used.
He said the competition brought everyone together and encouraged a bit of rivalry and banter between families.
"It brightens up my day. It is the busy time of year and when I come across a nice, funny letterbox it puts a smile on my face."
