There are no Muslim Malays in the top echelons of Singapore's army, and few among the senior ranks of its judiciary, but a member of its poorest ethnic minority is set to become the first woman president of the city-state this week.

Halimah Yacob, a former speaker of parliament, will be formally named to the mostly ceremonial post Wednesday, media reported, after other candidates fell short of the criteria set for contesting the election.

Aiming to strengthen a sense of inclusivity in the multicultural country, Singapore had decreed the presidency would be reserved for candidates from the Malay community this time.