Based on descent from Finnish parents or grandparents:
United States: ~653,000 Finnish Americans finlandabroad.fi+3reddit.com+3reddit.com+3reddit.com+15en.wikipedia.org+15iiab.me+15
Canada: ~143,600 Finnish Canadians iiab.me+1en.wikipedia.org+1
Australia: ~22,400 with Finnish ancestry (plus ~7,900 Finnish-born) reddit.com+4en.wikipedia.org+4reddit.com+4
Russia
Ingrian Finns: ~25,000 holders of Finnish ‘Law of Return’ status stat.fi+15en.wikipedia.org+15reddit.com+15
Finnish-origin individuals in Russia: ~20,000 Finnish-identified in 2010 census monocle.com+15en.wikipedia.org+15link.springer.com+15
Sweden: ~700,000 Finnish-origin reddit.com+4link.springer.com+4reddit.com+4
Global total: ~1.6 million people of Finnish descent across 29 countries en.wikipedia.org+15link.springer.com+15monocle.com+15
Note: These figures are ancestry-based. Not all would qualify legally (need parent/grandparent citizenship) or wish to apply—but overall eligible could number several hundred thousand globally, with notable concentrations in North America and Russia.