Subnational governments in Asia and the Pacific are key providers of the public services and infrastructure required to achieve the Sustainable Development Goals. Given this role, it is essential that policymakers and development partners understand and support the effective functioning of multi-level governance structures and subnational government finances across the region. This joint OECD-ADB report provides a comprehensive overview of subnational governments across Asia and the Pacific. It covers over 467,000 subnational governments from 26 countries, which represent 53% of the world’s population and 40% of global GDP. On average in 2020, subnational governments in the region accounted for 29% of total public expenditure (8.8% of GDP), 35% of total public revenue (8.5% of GDP) and 38% of public investment (2% of GDP). Harnessing unique data from the 3rd edition of the OECD-UCLG World Observatory on Subnational Government Finance and Investment, the analysis highlights how decentralisation and territorial reforms have reconfigured the structures and finances of subnational governments in the region. It covers a range of topics including fiscal rules, financial management capacity, priority-based budgeting, asset management and the use of public-private partnerships.