Contrary to ageist stereotypes, anxiety disorders are less common in older compared with younger adults. However, anxiety is often under-recognized and undertreated in this population. Anxiety disorders affect around 1 in 10 older adults, are unremitting, and are associated with a range of negative outcomes, including increased risk of depression, cognitive and functional decline, physical health problems, increased healthcare use, and suicide. This article summarizes the epidemiology and risk factors of anxiety in later life, explores variations in symptom presentation compared with younger adults, and outlines recommendations for assessment and treatment.