Halimah Yacob, a former speaker of parliament from the Muslim Malay minority, was 'elected' to the largely ceremonial post. But critics expressed dismay that other candidates were disqualified and the election went uncontested.
Singapore got its first female president on Wednesday, but the milestone was overshadowed by criticism that her selection was undemocratic after she was handed the job without a vote.
Halimah Yacob, a former speaker of parliament from the Muslim Malay minority, did not have to face an election for the largely ceremonial post after authorities decided her rivals did not meet eligibility criteria.
It was not the first time in the affluent city-state, which is tightly controlled and has been ruled by the same party for decades, that the government has disqualified presidential candidates, making an election unnecessary.
But there was already unease about the process as it was the first time that the presidency had been reserved for a particular race, in this case the Malay community. The decision to hand her the job without an election added to the anger.
'President for everyone'
Yacob was a member of parliament for the ruling People's Action Party for nearly two decades before resigning to contest the presidency. She addressed the concerns about the selection process after being named president-elect.
"I'm a president for everyone. Although there's no election, my commitment to serve you remains the same," she said.
Yacob added she would "start working immediately" to bring the country together.
She also insisted her status as Singapore's first female president was "not just tokenism," in a speech to a cheering crowd while wearing orange, a colour supposed to symbolise unity.
"Every woman can aspire to the highest office in the land when you have the courage, determination and will to work hard," she said.
Singapore's head of state has limited powers, including vetoing senior official appointments. But an establishment figure has always held the role and there are rarely tensions with the government.
Authorities decided to allow only candidates from the Malay community to put themselves forward for the presidency to foster harmony in the city-state of 5.5 million people which is dominated by ethnic Chinese, and give more opportunities to minorities.
Yacob is the first Malay president of Singapore in almost five decades. The last was Yusof Ishak, president from 1965 to 1970, the first years of the city-state's independence.
But the decision to limit candidates to one race had caused concern, including among Malays, as it was seen as positive discrimination that ran counter to the city-state's traditional meritocratic principles.
Five people had originally put their names forward for the presidency and the government had scheduled an election for September 23.
Two were quickly eliminated as they were not Malay. The two others, Malay businessmen, were disqualified on Monday as their companies were smaller than required by strict new eligibility rules introduced last year.
Yacob automatically qualified as she has held public office. She will be inaugurated in a ceremony on Thursday.