Apart from Baghdadi, Germany Chancellor Angela Merkel, Russian president Vladimir Putin, Iran's president Hassan Rouhani, US presidential candidate Donald Trump, Black Lives Matter activists, Caitlyn Jenner and Uber CEO Travis Kalanick are among finalists for the annual. Award.
Time magazine editors chose a shortlist of candidates for the '2015 Person of the Year.
Indian Prime Minister Narendra Modi declared the winner of reader poll for TIME Person of the Year 2014. In the final tally, Modi received more than 16% of the almost 5 million votes cast.
Baghdadi has been described as leader of ISIS who has inspired followers to both fight in his self-declared caliphate of Iraq and Syria, and also stage attacks in countries like Tunisia and France.
Here is how the other contenders have been defined by the TIME
Black Lives Matter activists, who have protested inequality towards African Americans, especially in their treatment by law enforcement.
Caitlyn Jenner, whose coming out as a transgender woman prompted widespread conversations about gender identity and issues of equality for the LGBT community.
Travis Kalanick, who as CEO of Uber drove his car-hailing company to a nearly $70 billion valuation, but also drew criticism about the downside of the sharing economy.
Angela Merkel, who as German chancellor has been at the center of major news events this year, from economic strife in the Eurozone to Europe's ongoing migrant crisis.
Vladimir Putin, who as president of Russia has defied Western sanctions over his country's military activity in Ukraine to play a critical but precarious role in the war on ISIS.
Hassan Rouhani, who as president of Iran is seeking to bring his country out of pariah status and repair its sanctions-crippled economy by pursuing a nuclear deal with the West.
Donald Trump, whose populist rhetoric has made him frontrunner in the race for the Republican presidential candidacy and stirred debate about the party's future.
The 2015 Person of the Year will be unveiled on Wednesday.