Poland recorded the world's fastest growth in its ultra-high-net-worth individual (UHNWI) population over the past decade, with the number of residents holding at least US$10 million in net assets rising 109.2%, according to The Wealth Report 2026 published by global property consultancy Knight Frank.

Knight Frank defines ultra-high-net-worth individuals as people with net assets of US$10 million or more, excluding their primary residence.

Poland narrowly outpaced Qatar, where the ultra-wealthy population increased 106.9%, while Türkiye ranked third with 93.6% growth. Romania followed closely at 93.0%, meaning four of the world's five fastest-growing UHNWI populations were located in Central Europe or the Middle East .

Greece ranked fifth with 74.0% growth, followed by Israel at 71.4%, Saudi Arabia at 69.2%, the Czech Republic at 67.4%, India at 63.4%, while Singapore and the United Arab Emirates shared tenth place with 54.5% growth.

Knight Frank said the rankings measure the percentage increase in each country's UHNWI population over the ten years to 2025, reflecting changes in wealth creation rather than the total number of wealthy individuals.

Poland's rapid rise has been driven by sustained economic expansion, rising business investment, increasing exports and the growth of domestically owned companies since joining the European Union in 2004. According to the World Bank, Poland has been one of Europe's fastest-growing major economies over the past two decades, creating new wealth across manufacturing, technology, finance and logistics.

Qatar and Saudi Arabia continued to benefit from energy revenues alongside efforts to diversify their economies through investment in finance, tourism, infrastructure and technology under long-term national development strategies. Türkiye's growth reflected the expansion of private enterprise and asset appreciation despite periods of high inflation and currency volatility.

India remained the only country from South Asia to enter the top ten. Knight Frank has previously identified India as one of the world's fastest-growing wealth markets, supported by expanding entrepreneurship, technology companies, manufacturing and financial services.

Knight Frank noted that wealth creation is becoming increasingly geographically diverse, with emerging markets accounting for many of the fastest-growing UHNWI populations, even as established financial centres continue to host larger absolute numbers of wealthy individuals.

The findings underscore how economic growth, business formation and rising asset values are reshaping the global distribution of wealth beyond traditional centres in North America and Western Europe.