@maxdancona,
Native Esperanto speakers estimate between 1,000 to several thousand, fluent speakers from 63,000 to two million according to what source you believe.
There had actually been an "Esperanto country": Neutral Moresnet, a small Belgian–Prussian condominium Europe that existed from 1816 to 1920 and was jointly administered by the United Kingdom of the Netherlands (Belgium after its independence in 1830) and the Kingdom of Prussia.
Esperanto was the official language from 1908 onward