Residents are encouraged to decorate their home so they can be in the running to win $5000 worth of prizes.
Blacktown Mayor Stephen Bali said the event was a great way to get into the Christmas spirit.
“This competition is a fantastic way to get the community involved in spreading the Christmas joy,” Cr Bali said
“It is pleasing to see Blacktown City residents getting into the Christmas festivities.”
If your house is impressively lit up or decorated for Christmas, send your address to christmas email@example.com