This article is a systematic review of international studies on help-seeking for problem gambling. Help-seeking included professional services (in person and distance-based), non-professional help (e.g., from family and friends), and self-help. The researchers found 24 studies that met their inclusion criteria. Globally, around 0.23% of the general population had sought help, either in the past 12 months or at some point in their lifetime. Prevalence estimates were higher in studies that looked at lifetime help-seeking than studies that looked at current help-seeking. Help-seeking was also higher among people with problem gambling and moderate-risk than people with low-risk. Around 1 in 5 people with problem gambling and 1 in 25 people with moderate-risk gambling had sought help for gambling-related problems.