The least populous country in 2026 is Vatican City, with roughly 800 residents.

Quick Scoop

  • Vatican City is the smallest sovereign state by population, and it remains the least populated country in current 2026 lists.
  • Other very small countries include Tuvalu, Nauru, Palau, and San Marino.

Note

Some sources also discuss the “least populous nation” in other contexts, such as countries reaching major sports milestones, but that does not change the population ranking.

TL;DR

Vatican City is the answer for 2026.