In partnership with the California Association of Mental Health Peer-Run Organizations (CAMHPRO), Live & Learn, Inc. conducted a survey on the impact of stakeholder advocacy on decisions affecting public mental health systems in California. The California Mental Health Stakeholder Advocacy Survey was designed by people with personal experience of the mental health system and related advocacy work from CAMHPRO, Live & Learn, Inc., and Shifa Consulting. The objective was to pilot an approach to help CAMHPRO evaluate the impact of consumer advocacy in the state and to document the activities that advocates engage in (e.g., legislative testimony, demonstrations, campaigns). We asked advocates and decision-makers how these groups engage in advocacy, what their roles are, the goals of advocacy, and its perceived effectiveness in fostering change. The survey was conducted in April 2016 and asked about advocacy activities in California in the past 6 months conducted by people who identify as consumers, survivors, ex-patients, or peers. There were different versions of the survey for consumer advocates and for county decision-makers.