Seoul and Singapore are experiencing a demographic shift as their populations age. Over the years, both cities have formulated plans, programmes and policies to support their seniors to live healthily, actively and purposefully as they navigate their daily lives within high-density urban environments. Both Seoul and Singapore share common aspirations to continue building age-friendly cities that support and empower their seniors. Age-Friendly Cities: Lessons from Seoul and Singapore is the third joint research publication between the Centre for Liveable Cities and the Seoul Institute. This publication explores the current and future ageing landscape in Seoul and Singapore and their ongoing efforts to address these issues. Case studies are examined under the themes of ageing-in-place and active ageing to distil common lessons on how cities can be more inclusive for seniors.