The researchers examined the impacts of the COVID-19 lockdown on gambling and problem gambling among Canadian adults. They compared the participants’ gambling during the lockdown to what they had reported six months earlier. Data came from 3,449 participants. Almost one-third of participants stopped gambling during the lockdown. About 17.6% of participants who gambled in-person only started to gamble online. People who continued to gamble during the lockdown engaged in fewer types of gambling, gambled less frequently, and spent less time and money. Problem gambling generally decreased. Perceptions of changes in gambling did not closely align with actual changes. A number of gambling-specific and non-gambling specific factors predicted problem gambling during the lockdown.