Industrialised nations worldwide are ageing, and this demographic trend is expected to continue well into the twenty-first century. The ageing trend is influencing not only the average age of the workforce, but the age range and age diversity of the workforce are increasing as well. A more age-diverse workforce can benefit organisations and societies; however, it can also have negative consequences stemming from age-related biases, prejudices, and discriminatory behaviour. In fact, ageism and claims of age-related discrimination are on the rise. This article provides an overview of workplace ageism literature by first defining the concept of workplace ageism, reviewing and synthesising the current workplace ageism literature, and identifying workplace interventions being introduced to address workplace ageism.