The family members, ranging in age from 27 and 52, face a total of 114 charges including money laundering and identity fraud.
Calgary police announced the charges on Tuesday, saying there were 19 victims of identity theft involved in a fraud worth about $56,000.
The suspects allegedly took personal identification from parked vehicles in Calgary, Banff and Invermere, B.C., between March 2012 and October 2013.
"Suspects would use personal identification information stolen from parked vehicles and use it to apply online for Home Depot credit cards," police said.
"These credit cards were then used to purchase Home Depot gift cards at locations in Calgary, Edmonton, Red Deer, Airdrie, Okotoks and Cranbrook, B.C. These fraudulently purchased gift cards were then sold through online sites at a discounted price."
Suspicious Home Depot Canada staff brought their concerns to the Calgary officers.
“It’s not just a crime against a retailer, but the community we live and work in," said Bill Davies, director of asset protection for Home Depot Canada. "We thank the police for all their support."
The five family members will be in Calgary courtrooms this week.