Nikola I Никола I
King of Montenegro
Reign	28 August 1910 – 26 November 1918
Predecessor	Himself (as Prince of Montenegro)
Successor	Title abolished
Prince of Montenegro
Reign	13 August 1860 – 28 August 1910
Predecessor	Danilo I
Successor	Himself (as King of Montenegro)
Born	(1841-10-07)7 October 1841 Njeguši, Montenegro
Died	1 March 1921(1921-03-01) (aged 79) Cap d'Antibes, France
Burial	1 October 1989 Court Church, Cetinje, Montenegro[a]
Spouse	Milena Vukotić ​ ​ (m. 1860)​
Full name Nikola Mirkov Petrović-Njegoš
House	Petrović-Njegoš
Father	Mirko Petrović-Njegoš, Grand Voivode of Grahovo
Mother	Anastasija Stana Martinović
Religion	Serbian Orthodoxy
Signature

Nikola I Petrović-Njegoš (Serbian Cyrillic: Никола I Петровић-Његош; 7 October [O.S. 25 September] 1841 – 1 March 1921) was the ruler of Montenegro from 1860 to 1918. He was the prince from 1860 to 1910. He was the country's only king, which was from 1910 to 1918. After Austria-Hungary collapsed in 1918, Montenegro joined the Kingdom of Yugoslavia.

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