Over 164,000 people in Orange County are affected by dementia or mild cognitive impairment Since 1982, Alzheimer’s Orange County has been Orange County’s center for Alzheimer’s resources. We are dedicated to providing quality care and support services to the thousands of residents of Orange County who are affected by Alzheimer’s disease or other related dementia, and also partnering with local researchers to populate clinical trials to help find a cure. Our mission: To serve Orange County individuals with memory loss, frail seniors, and those that support them.