The Vatican City as an independent country is about 97 years old as of 2026. It was officially created on 11 February 1929 with the Lateran Treaty between the Holy See and the Kingdom of Italy.

If you mean the Christian site on Vatican Hill rather than the modern state, its religious history goes back much further, to the 1st–4th centuries:

  • Tradition says Saint Peter was martyred and buried on Vatican Hill around the 60s AD.
  • The first St. Peter’s Basilica was built there in the 4th century under Emperor Constantine, making the area a major Christian center more than 1,600 years ago.

So:

  • Age of the state of Vatican City : founded 1929 → about 97 years old in 2026.
  • Age of the religious site on Vatican Hill : in use as a Christian center for roughly 1,600–1,700 years.

Information gathered from public forums or data available on the internet and portrayed here.