Here is how the major biographies of Tesla have characterized his place of origin.

| Tesla: Inventor of the Electrical Age

W. Bernard Carlson
Princeton University Press, May 7, 2013
p.13 

Nikola Tesla was born in 1856 in Smiljan in the province of Lika in what is today Croatia. At that time, Croatia was the military frontier district of Austro-Hungarian Empire and the area sometimes referred to as Krajina.

•TABSmiljan, Austrian Empire (Modern Day Croatia)
•TABSmiljan, Croatian Military Frontier, Austrian Empire
•TABSmiljan, Croatian Military Frontier, Austrian Empire (modern-day Croatia)

| Tesla: Man Out of Time

Margaret Cheney
Simon and Schuster, Oct 2, 2001
p. 25

Nikola Tesla was born at precisely midnight between July 9 and 10, 1856, in the village of Smiljan, province of Lika, Croatia, between Yugoslavia’s Velebit Mountains and the eastern shore of the Adriatic Sea.

•TABSmiljan, Croatian

| Wizard: The Life And Times Of Nikola Tesla
Marc J. Seifer
Citadel Press, May 1, 1998
p. 1

It was during a crackling summer storm in Smiljan, a small hamlet at the back edge of a plateau set high in the mountains, when Nikola Tesla was born. The Serbian family resided in the province of Lika, a plateau and gentle river valley in Croatia where wild boar and deer still dwell….
…
In the early 1800s, having been briefly part of Napoleon’s Illyrian provinces, Croatia was now a domain of Austria-Hungary. With its neighboring Slavic countries of Bosnia, Herzegovina, Montenegro, Serbia, an Slovenia, Croatia was sandwiched between the ruling Hapsburg dynasty to the north and the Ottoman Empire to the south.

•TABSmiljan, Croatian
•TABSmiljan, Austrian Empire (Modern Day Croatia)
•TABSmiljan, Croatian Military Frontier, Austrian Empire
•TABSmiljan, Croatian Military Frontier, Austrian Empire (modern-day Croatia)

| Nikola Tesla: A Spark of Genius
Carol Dommermuth-Costa
Twenty-First Century Books, 1994 
p.11
Nikola Tesla was born at midnight between July 9 and 10, 1856, in Smiljan, a small village in Croatia. 

•TABSmiljan, Croatian

 Prodigal Genius: The Life of Nikola Tesla
James O’Neill
Ives Washburn, 1944
p. 11

There was no evidence whatever that a superman ws being born when the stroke of midnight between July 9 and 10 in the year 1856, brought a son, Nikola, to the home of the Rev. Milutin Teslan and Djouka, his wife, in the hamlet of Smiljan, I the Austro-Hungarian border province of Lika, now a part of Yugoslavia.

•TABSmiljan, Austrian Empire (Modern Day Croatia)
•TABSmiljan, Croatian Military Frontier, Austrian Empire
•TABSmiljan, Croatian Military Frontier, Austrian Empire (modern-day Croatia)

| The Inventions, Researches and Writings of Nikola Tesla The inventions, researches, and writings of Nikola Tesla
Thomas C. Martin, Nikola Tesla
Health Research Books, Nov 1, 1894 
p. 3

•TABNikola Tesla was born in 1857 at Smiljan, Lika, a borderland region of Austro-Hungary, of the Serbian race. Which as maintained against Turkey and all comer so unceasing a struggle for freedom

•TABSmiljan, Austrian Empire (Modern Day Croatia)
•TABSmiljan, Croatian Military Frontier, Austrian Empire
•TABSmiljan, Croatian Military Frontier, Austrian Empire (modern-day Croatia)

There just isn't consensus among Tesla's biographers for this, and I strongly suggest tha