The title of first runner-up went to the contestant from the Philippines, Janine Tugonon.
The title Miss Congeniality was given to Miss Guatemala Laura Godoy by the contestants.
Last year’s winner Leila Lopes of Angola, crowned jubilant Culpo, 20 years old, to succeed her in a year-long reign.
It is the first win for an American woman since 1997, when the title was won by Brook Lee.
Miss Venezuela, Irene Sofia Esser Quintero, placed third in the contest. Fourth place went to Miss Australia Renae Ayris, and fifth to Miss Brazil, Gabriela Markus.
The pageant, which purports to pick the world’s most beautiful woman, was held this year in Las Vegas, and saw 89 contestants compete in three categories: swimsuit, evening gown and interview.
