Countries evolved from kingdoms and empires, so it would depend upon your def of "country."
Spain
Spain.
Spain had established a permanent settlement in North America before 1600. St. Augustine was established as a fort in 1565. It was the first permanent settlement in what would become the United States.
Russia , -or Canada.
Fort Mose, 2 miles north of St. Augustine, Florida, established in 1738 declared by then governor Manuel Montiano, of the Spanish held territory.
San Marino was the first established country.
Egypt - a contender for first in the world.
San Marino was the first established country and gained independence from the Roman Empire in 301.
What country is the first organized medical school, established in 10th century
france
Portugal (1474).
Spain
In modern world first Hindu country that was established is Nepal. Other than that no country or state is officially Hindu state. Nepal was established in the 20 th century after British left India.
the first one who established Yokilazni the new country by Rome
Portuguese
France.
San Marino was truly the first established country. It gained independence from the Roman Empire in 301 and was the first republic.