The Asia-Pacific region is at the forefront of population ageing. The population of people aged 60 years and over is growing at a faster pace than anywhere else in the world. Most developing countries of the region have limited resources and must carefully make informed, evidence-based decisions about the future. This entails collecting data on different dimensions of ageing, but also effectively using existing data. This report provides a wide range of good practice examples where the use of data has had a positive effect on the policy and programming process. It also looks at strategies for overcoming barriers to, and promoting the uptake of, data in policy and practice.