Recent empirical findings have refined the conceptualization and treatment of anxiety disorders in older adults, which are associated with significant consequences, including lower quality of life, deficits in cognitive functioning, and poorer recovery from physical illnesses. The DSM‐5 includes guidance as to the recognition of these disorders in older adults. Nevertheless, some important aspects of anxiety make detection and diagnosis challenging in this age group. With respect to treatment, a number of selective serotonin reuptake inhibitor medications have been shown to be efficacious. Cognitive–behavioral therapy and mindfulness‐based interventions are effective psychotherapies, and there may be potential for online treatment of anxiety in older adults. Augmentation strategies are also being tested and have shown promise for enhancing therapeutic outcomes. These and other issues, such as neurobiology and cognitive functioning of anxious older adults, are discussed. This wave of research has greatly enhanced our knowledge of anxiety across the lifespan.