Can a US citizen live in Monaco?

Yes, US citizens can live in Monaco. The route is to apply for a long-stay (type D) visa from the French consulate in the US (since Monaco uses the French visa system for the initial entry), then apply for a Monaco carte de séjour once in the principality. As a tourist, US citizens can stay 90 days in any 180-day Schengen window without a visa. To convert to residency you need proof of accommodation in Monaco (rental contract or purchase deed), a bank reference from a Monaco-licensed bank typically showing €500,000 to €1,000,000+ on deposit, a clean criminal record, and proof of health insurance. US citizens remain liable for US federal tax filing on worldwide income regardless of Monaco residence; Monaco itself imposes no personal income tax. The total residency process typically takes 6 to 12 months. For the full picture, see our Monaco cost of living page.